These round, oversized sunglasses might be a good look on Beyonce, but you know what isn’t? Lip-sync! Although she’s obviously a real, talented singer, Knowles’ performance bought up a lot of controversy, with sources believing that she didn’t sing live. Her singing of the anthem, while dramatic and acclaimed – but have been lip-synced. Sources claim that this was just a safety measure against cool weather and the unpredictable, some say Beyonce decided to lip-sync last minute, and others say her performance was live, while the band just mimed playing their instruments. Right now, only Beyonce knows the truth (probably Jay-Z too), but the point of the matter is this is not so unusual in the music business. Even Whitney Houston lip-synced at the Super Bowl in 1991, due to similar reasons.