Surprisingly, the biggest controversy stemming from PRESIDENT OBAMA'S inauguration Monday has nothing to do with his birth certificate. It's whether or not BEYONCÉ lip-synced the national anthem.

Beyoncé's performance was pretty stellar, and got rave reviews. But is that because she didn't actually sing it?

It's standard procedure for musicians to record a backing track they can sing and play along to. And yesterday, a spokeswoman for the Marine Corps Band, which backed up the performance said Beyoncé made the decision to rely entirely on that track.

She said, 'We all know Beyoncé can sing. We all know the Marine Corps Band can play. We do not know why she decided to go with the pre-recorded music at the last minute.' She added the band played live for the other performers, like KELLY CLARKSON, but was specifically told to FAKE IT for Beyoncé.  However, a Marine Corps spokesman later watered down that claim. But he didn't specifically deny it. He admitted the band used a prerecorded track, because there wasn't time to properly rehearse.

People are also trying to make hay out of the fact Beyoncé posted a picture of herself on Instagram, in which she's in a recording studio, holding sheet music for the national anthem. But that proves nothing, since we already know she did record a backing track.

baddiebey/Instagram

Meanwhile, here's a list of other ladies who've lip-synced high-profile gigs. Beyoncé's on this one, too.