Beyoncé lip-synced the national anthem at Obama's inauguration?

Beyoncé sang the national anthem at President Obama's inauguration ceremony yesterday and received overwhelming praise for her performance, but new reports are claiming that she didn't sing live. They say she was lip-syncing to a pre-recorded backing track while members of the Marine Corps Band, which was set to back her instrumentally, played live. Well, watch the video above and tell us what you think...