"Not Myself Tonight" is a song by American singer Christina Aguilera for her sixth studio album Bionic (2010). It was released by RCA Records as the lead single from the album on April 2, 2010. Produced by Jamal Jones a.k.a. Polow da Don and co-written in collaboration with Greg Curtis, Ester Dean and Jason Perry, "Not Myself Tonight" is an electropop, electro-R&B and dance-pop song, which explores Aguilera's adoption of different personas on the dance floor.

"Bionic" is a song recorded by American singer Christina Aguilera, taken from her sixth studio album of the same name (2010). The song was written by Aguilera, Kalenna Harper, John Hill and Switch, while production was done by the latter two. "Bionic" is an electronic number and has garnered comparisons to works by artists including Santigold and Janet Jackson.