Rebecca Black to Leno -- Wanna Hear Me Sing???
Rebecca Black to Leno Wanna Hear Me Sing???
Rebecca Black brought her talents to "The Tonight Show" last night -- and if you listen close enough ... you can hear her sing "Friday" underneath the BLARING backing track.
![](https://cdn.statically.io/img/imagez.tmz.com/image/1e/16by9/2011/12/16/1e248bc873275b698107713619121450_md.jpg)