There is a new trailer of Alvin and the Chipmunks 2, aka Alvin and the Chipmunks the Squeakquel:

ALVIN AND THE CHIPMUNKS THE SQUEAKQUEL
Plot:
“The world famous singing pre-teen chipmunk trio return to contend with the pressures of school, celebrity, and a rival female music group known as The Chipettes.”

Girl power shines from the little female squirrels! Our friends Chipmunks will have girlfriends!
:)