Rihanna Runs Through AMA Rehearsals

Rihanna runs through her secret performance during the 2008 American Music Awards rehearsals held at the Nokia Theatre L.A. Live on Thursday in Los Angeles.

Her performance looks explosive–literally. Pyrotechnics are always a good thing!!! Boyfriend Chris Brown was also spotted in the theater.

Other performance for the night include Beyonce, Christina Aguilera, Jonas Brothers, Miley Cyrus, Leona Lewis, Kanye West, Taylor Swift, Alicia Keys, Ne-Yo, Mariah Carey, Coldplay, New Kids on the Block, Pussycat Dolls, P!nk, The Fray and Annie Lennox.