The “Part of Me” pop star performed at a Las Vegas, Nev., fundraiser for President Obama’s reelection campaign on Thursday wearing a black and white ensemble resembling a presidential ballot. The “ballot” had a box for Obama and Vice President Biden marked off.

On Friday, Perry, who turned 28 this week, posted a photo on Twitter posing with the first lady while wearing what appears to be a black dress adorned with round buttons. “NOW my bday is complete! Lunch with @MichelleObama #chicvote” the singer wrote.

Photo: Twitter