'Vampire Diaries' star Kat Graham performs on 'Oh Sit!' finale: Watch!

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kat-graham-heartkiller.jpgThe CW's reality competition series "Oh Sit!" ends its first season this Wednesday, Oct. 3 at 8 p.m. -- right before a brand new episode of "Supernatural" -- and this time, they're keeping it all in the C-dub family. "Vampire Diaries" star Kat Graham will hit the stage to perform her latest hit, "Heartkiller," as the episode's musical guest. Check out a clip of the performance below.

"Oh Sit!" follows 12 contestants in a high-octane musical chairs competition, hosted by Jamie Kennedy and Jessi Cruickshank. The series was just renewed for a second season, along with fellow summer reality series "Breaking Pointe."

As for Graham, she'll step back into her Bonnie boots on "The Vampire Diaries" on Thursday, Oct. 11 at 8 p.m. EST. We'll see Bonnie take things just a little too far in a last-ditch effort to save Elena from turning into a vampire -- a move that will have major repercussions throughout the season. Her EP "Against The Wall" is available on iTunes now!