Rebecca Black Appears to Lip Sync 'Friday' on Jay Leno

The backing track starts before Black opens her mouth.

Rebecca Black appeared to lip sync on The Tonight Show with Jay Leno Tuesday.

The backing track on "Friday" began before Black even had the microphone in her hands. She continued to mouth the words along with the song. Watch above.

A rep for NBC says Black sang live and was backed by Ricky Minor and the Tonight Show band.

Black has said she wants to release an acoustic version of her song to prove that she can sing without AutoTune.

Friday has been streamed more than 35 million times on YouTube.

Despite a lot of Internet mocking, she's received messages of support from Lady Gaga, Simon Cowell, Ryan Seacrest and Nicole Richie.

After appearing on Leno, Black Tweeted that she met Limitless star Bradley Cooper at the show: “ASDFGHJKLKIOP I JUST MET BRADLEY COOPER. OMG. I almost fainted.”