A/N: Another seven reviews! I'm so happy! -squeals- Okay, now that the squealing is done… I just want to say that Addison aren't getting together for awhile, but since there are many people wanting more of them, I've tried to add them in more. Just to let you all know, I have a plans, many, many plans for this story, they may be small sometimes, but they are still plans. I'll stop typing this now so you can start reading the story. Please R & R..

Summary:Completely AU. One lawyer, one baker, one science professor, one real estate agent, one architect, and now one upcoming fashion designer. Drama is bound to catch up to them. (not all of the characters will be in it) Pairings decided, you'll find out what they are throughout.

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"I have an idea! Lets throw a Halloween party!" Izzie said later that night. She was standing beside the couch that Mark was sitting on. Addison was sitting on the arm of the arm chair where Alex was sitting.

"Oh, hell no!" Alex said seriously.

Addison gave Alex a look which he just looked at and mouthed 'what' to her. She rolled her eyes at him in response.

Mark glanced at the two before looking at Izzie. "Maybe you should think about that a little more, and by Halloween party, you also mean it involves costumes?"

Izzie smiled at Mark and nodded. "Costume and all, and I did think about it. You all could invite some people who you work with." She looked at all three of them. "It could be fun!"

Addison smiled devilishly. "Well, it would be a good excuse for me to wear my devil costume."

"Devil?" Alex smirked at Addison. "You naughty, naughty girl." He said wiggling his eyebrows.

Addison rolled her eyes at Alex and slapped him on the back of his head earning an 'ow' from him. She looked at Izzie. "I'm in."

Mark nodded. "Me too."

Izzie smiled brightly and turned to Alex expectantly.

Alex rolled his eyes. "Fine, I'm in." He smirked. "But only because I want to see Addison in her devil's costume." Addison slapped him on the back of his head again. "Ow!"

"Yay!" Izzie said smiling.

As they were talking, so were two other people upstairs were also talking.

"Meredith, I was wondering if maybe you would like to go out to dinner sometime?" Derek asked casually as he was buckling his belt.

Meredith looked at Derek and bit her bottom lip. "Derek, I don't know. I would rather this be a just sex thing between us."

Derek furrowed his eyebrows. "Like friends with benefits."

Meredith nodded. "Exactly."

Derek sighed. He really didn't want that, but right there and then, he would do anything to have any part of her. "Okay."

"Good, now that that is settled, lets go downstairs and hang out with the others." She gave him a small smile before opening the door and walking downstairs.

Derek sighed and followed Meredith.

"Look, it's the sex addicts!" Alex said as Meredith and Derek walked down the stairs.

Addison gave him a look and slapped him on the back of his head again. "And you still owe me for the damage!"

Alex sighed. "Fine, how much?"

"Five thousand dollars."

"Five thousand dollars?! You've got to be kidding me!"

Addison shook her head. "Nope."

Alex sighed again. "Fine." He stood up. "I'll go make out the check." He walked out of the living room and out of the towns home to his.

"So…" Derek said. "What are we talking about?"

"I'm having a Halloween party, invite your coworkers, but only the ones who you get along with, we don't want people you personally hate here." Izzie said smiling.

"Here?" Meredith asked.

Izzie nodded her head. "Yeah, is that alright with you?" She asked not sure if Meredith would be comfortable with this.

Meredith nodded. "It's fine."

Izzie beamed. "Okay, well, since it's a Halloween party, it'll be on Halloween!" She had some thoughts about the decorations and food. "I'll be right back." She jogged up the stairs to her room, she had to jot down those thoughts.

"With costumes?" Derek asked looking at Addison and Mark. He watched as they both nodded. "Thought so."

Alex walked into the living room and handed Addison her check. "Happy now?"

"Ecstatic!" Addison said taking the check and holding it up to the light.

Alex rolled his eyes. "What are you doing?"

"Just making sure it's real. It is." Addison bent down and picked up her purse to put the check away.

Izzie was walked out of her room, but stopped at the top of the stairs smirking. She wlaked to Meredith's room and looked in. She smiled devilishly and walked to the top of the stairs once again. "Hey Mark! Alex! I need some help with something!" She called down to them.

Alex and Mark looked at each other confused. What would she need both of their help with. They both shrugged. Mark stood up and followed Alex as they walked up the stairs.

Meredith's eyes widened in realization. "Izzie! Don't you dare!" She ran up the stairs.

Derek looked at Addison confused. "What was that about?"

Addison shrugged. "Not sure, but it ought to be funny."

"It probably will." Derek chuckled. "I'm going to get myself something to drink, want anything?"

Addison shook her head. "Nah, I'm good." She looked up hearing something loud. Something obviously fell to the floor. Addison smirked. "Definitely funny."

"Ow!" Izzie said as she fell to the floor.

Mark looked at Izzie concerned. He held his hand out to help her up. "Are you okay?"

"My butt hurts, but I'm fine." Izzie said putting her hand in his, and letting him help her up. She rubbed her butt with her other hand.

"Izzie, I am so sorry!? I didn't mean for you to fall!" Meredith said honestly. She really didn't mean for her to fall, she just accidentally bumped into her a little to hard.

Alex started to laugh to himself. It definitely was funny to watch, even though Izzie's butt hurt. He stopped laughing when Mark gave him a look.

"It's fine!" Izzie snapped still rubbing her butt.

"I guess now Mark can give you a butt massage, isn't that right Izzie?"

Both Mark and Izzie glared at Alex, not finding his so called 'joke' or whatever, amusing. Alex held his hands up in surrender.

"I'm going to get some ice." Izzie said walking down the stairs.

Alex smirked. "You got her mad now.

Mark gave Alex a look before looking at Meredith. "I'll talk to her." He walked down the stairs.

"He'll talk to her." Alex said in a reassuring way. Mark can get through to her, he always seems to one way or another.

Meredith looked at Alex still unsure. It was an accident after all.

Mark walked to the living room, and looked at Addison and Derek.. Derek was now sitting on the couch sipping his beer. "Is Izzie in the kitchen?"

Addison didn't respond she just kept looking through her magazine, she was listening to her Ipod, so she couldn't hear him, or anything else for that matter.

"I think she's in the kitchen, she said she had to get ice because her butt hurt. I didn't really want to know why, so I didn't question it." Derek said getting a weird look before sipping his beer again.

Mark nodded and walked to the kitchen. He watched as Izzie got an ice pack out of the freezer. "It really hurts doesn't it?"

"Yeah." Izzie said closing the freezer and putting the ice pack on her butt. "Why did I get a place with all hardwood floors?"

Mark chuckled. "Because it's easier to clean?" He was actually being serious. It was one of the reasons why she bought that towns home.

"Oh yeah." Izzie said with a slight.

"It really was an accident you know?"

Izzie nodded still holding the ice pack on her butt. "I know."

"But you are still a little angry at her for it?" Mark asked knowingly.

"No…" Izzie said not that convincingly.

Mark walked over to her. "Iz, you know I know you well enough to know when you don't tell the truth, so don't even try to lie. Now tell me, aren't you at least a little pissed that Meredith knocked you to the floor by accident?"

Izzie sighed. "It was an accident, I'm not that pissed." She said honestly.

"Now that my friend, I believe." He said with a smile. "Butt any better?"

Izzie nodded. "It actually is." She smiled back at him as she took the ice pack and put it back in the fridge.

"You're actually putting that back for other people to use?" Mark asked with his eyebrow raised.

"What they don't know won't hurt them." She said with a smirk. Izzie walked to a smiling Mark as they both made there way in the living room. She looked at the occupants of the living room. Meredith and Alex were standing by the couch. Meredith smiled at Izzie nervously. Izzie started to smile. "Now, about that Halloween party…"