The viral video "Barack Obama sings 'Call Me Maybe'" racked up more than 33 million views in six months, and we have to say, it's pretty impressive. The video doesn't actually showcase whether or not Obama can sing, but the president showed he can hold a tune at a fund-raiser in New York City on Jan. 20, when he sang a few lines of the Al Green classic, "Let's Stay Together," while on stage. Obama had the help of a celebrity music artist during his presidential campaign: Jay-Z. The rap mogul and his wife, Beyonce, threw the president a fund-raiser in September. Check out which friend of Jay-Z the president reportedly called out after an entirely different event on the next slide and follow the beat.