Jennifer Hudson

Watch out, Michelle. Jennifer Hudson sang Happy Birthday to President Barack Obama to ring in his 50th birthday Tuesday night.

The Grammy winner gave a more soulful rendition than Marilyn Monroe's sultry version for JFK. But that didn’t stop the comparisons from being made.

A crowd of 2,400 gathered for a special Democratic fundraiser at the Aragon Ballroom in Chicago and the room went wild.

“I could not have a better early birthday present than spending tonight with all of you,” he told the crowd. “It is true that I turn 50 tomorrow, which means that by the time I wake up, I will have an email from AARP, asking me to call President Obama and tell him to protect Medicare.”