Olivia Alexander (born Olivia Usey; May 17, 1988) is an American actress, singer, and dancer. She has played lead roles in Attack of the 50 Foot Cheerleader and 30 Nights of Paranormal Activity With the Devil Inside the Girl With the Dragon Tattoo. Four songs from her debut EP ‘Its On’ were featured in Attack of the 50 Foot Cheerleader, including the title track ‘Attack Attack’.