Rebecca Black -- Which Seat DID She Take?

7/21/2011 3:15 PM PDT

"Friday" singer Rebecca Black finally answered the burning question EVERYONE has on their minds ... all without saying a single word.

The 14-year-old called shotgun after some retail therapy at Fred Segal in L.A. yesterday -- but sadly, the singer tells us, she still hasn't heard a peep from Justin Bieber.