What song is sung in the shower in pitch perfect trailer
The song that is sung in the shower in pitch perfect trailer is the acapella version of No Diggity by Blackstreet. The song is the theme song for the commercial. For more information, go to http://en.wikipedia.org/wiki/No_Diggity.
It's "Titanium" by David Guetta and Sia. "No Diggity" is later in the trailer.