Disclaimer: JK Rowling and myself are completely different entities.
It was 4 AM and Severus Snape was tossing and turning. He stared blankly at the speckled ceiling.
"Sev?" He heard a voice call. A voice he hadn't heard in years. He jumped up.
"Lily?" He asked.
"I'm on the floo."
He tossed the covers off from him and ran to the shabby little fireplace. "Are you flooing me to rub in your engagement to James?"
Lily laughed. "NO! Actually just the opposite. I don't want to walk down the aisle with him. I want to walk down the aisle with you!"
He smiled. "Really?"
"Severus Snape, I've forgiven you. We were young, and didn't know anything. will you marry me?" She asked.
Snape jumped and shouted yes.
After months of planning, Severus and Lily were at the old park at which they met, ready to exchange vows.
As Lily started walking down the park to the swings where Sev and an old minister stood, she smiled. Alice Prewitt, her maid of honor, shot her a thumbs up.
Music started playing.
Oh, that's cute, you expected the wedding march to start playing?
No, that won't happen, 'cause you just got Rick Roll'd.
NEVER GONNA GIVE YOU UP, NEVER GONNA LET YOU DOWN! NEVER GONNA RUN AROUND, DESERT YOU! NEVER GONNA TELL A LIE, NEVER GONNA SAY GOODBYE, NEVER GONNA TELL A LIE, AND HURT YOU!
"Wait what's going on?" Severus asked.
James emerged from the bushes holding a stereo playing the Rick Astley song.
Lily smiled and high-fived James's free hand. "You just got Rick Roll'd."
Oh, and I'm also not Rick Astley.