NEW YORK (CBSNewYork) — President Barack Obama attended several fundraisers in New York City Thursday, but it was the one at the Apollo Theater that really got the crowd going.

The president was thanking the performers who preceded him, including soul singer Al Green and India.Arie, when he started to sing the opening of Green’s hit song “Let’s Stay Together.”

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“I’m, I’m so in love with you,” Obama sang to the audience which then broke out in cheers. “Those guys didn’t think I would do it. I told you I was going to do it.”

Obama is not the first musically inclined president – Clinton had his sax,  Nixon and Truman played piano,  Wilson played the violin, John Adams played the flute and Jefferson was a multi-instrumentalist serving up tunes on cello, clavichord and violin.  And lest we forget the 21st president, Chester A. Arthur who totally rocked the banjo.

We’re thinking that Obama could be the first president to take his singing career to the next level.  Sure he can stick to the classics, but wouldn’t it be interesting if he packed his set with some of today’s hottest jams?

(We know one thing: the Leader of the Free World should probably stay away from covering KeSha’s Tik Tok! )

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Tickets for the sold-out event ranged from $100 to $25,000.

But not everyone was cheering the Obama’s Big Apple visit.

More than 100 protesters rallied outside the Apollo Theater challenging the president on his economic policies. Inside, Obama touted his administration’s work on everything from ending the Iraq war to health care to about 1,400 supporters.

The president also attended a private fundraiser at the home of Spike Lee.

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How Does Obama’s Al Green Cover Rank with Others? Let us know below…