Brought to you by pure boredom.

"GIR, go away!" Zim yelled at the defective robot. He'd come to his lab to get away from GIR but he'd followed him.
"But I wanna sing for you!" GIR screeched.
Zim remembered the last concert GIR had done for him. It was awful. He only sang the worst songs.
"GIR, it's not that I don't want to hear you sing, it's that music isn't really my thing," he lied.
GIR gasped. "Don't worry, Masta! I help you find a song you like! Den we dance and sing!"
GIR ran to the elevator and went up to the house. Zim slapped himself. Now he'd have to listen to filthy earth songs. And worse, he'd have to watch GIR dance to them. GIR came back down carrying a radio in one hand a CD in the other. He sat down next to Zim, who was silently swearing in Irken, and put the CD in the radio. Zim put his hands over his anntennas as Firework by Katy Perry started playing.
"I like dis one!" GIR said happily.
"Well I don't!" Zim yelled.
GIR skipped to the next song. Zim thought the worst was over until Baby by Justin Beiber started playing.
"Oh my God!" Zim screamed. "I'm embarrassed FOR this guy!"
GIR looked disappointed. "Aw, you don't like it?"
"No!"
GIR skipped to the next song.
Ok, Zim thought. At least it can't get any worse. He realized he was wrong as soon as Who Says by Selena Gomez started playing.
"Seriously?" he said. "This is awful!"
GIR frowned and skipped to the next song.
"Dis is da last one," he told Zim.
"Thank the Tallests," Zim said quietly.
Half Way There by Big Time Rush started playing. Zim almost started crying.
"This is HORRIBLE!" he yelled.
GIR looked crushed as he turned off the radio and put the CD back in its case.
"You don't like da songs?" he asked sadly.
"No," he answered. "They make my antennas bleed with their filthiness."
GIR frowned. Then his face lit up like it did when he got an idea. Oh no, Zim thought. "I'll make you a song!" GIR said. He cleared his throat and started singing at the of his lungs. "BABY, BABY, BABY, OH! YOU'RE A FIREWORK! WHO SAYS, WHO SAYS YOU'RE NOT PERFECT, WHO SAYS YOU'RE NOT WORTH IT! WE'RE HALF WAY THERE! WE'RE LOOKING BACK NOW!"
"UGH!" Zim yelled. "MAKE IT STOP!"
I could tell you the rest, but it basically goes on like that for about three hours.

Before you get mad like you people do, I don't have anything against these songs/singers. They're just the first ones that came into my head that I don't think Zim would like.