Michelle Obama on Carpool Karaoke with James Corden Wednesday

Ever since "Late Late Show" host James Corden introduced "Carpool Karaoke," it's been a viral hit, attracting all sorts of megastars like Adele and Selena Gomez to sing along with him while he drives in his car. But First Lady Michelle Obama may one-up all of his former guests — and it appears she may have some Beyonce on the mind when she does.

"Stop, what's your business today at the White House," a gruff guard asks Corden as he pulls up to the White House gates in a minute-long preview video posted on YouTube by the "Late Late Show."

Corden meekly replies that he's there for a tour, when suddenly Michelle Obama opens his passenger door and has a seat next to a gaping Corden.

"I hear you're here for a 1:45 tour, and had a little time on my hands, so you want to go for a spin?" she says.

Corden asks Obama when the last time she got to do something like this was, and the answer is revealing.

"I've been in a car maybe — it was months ago with my daughter who learned to drive," she said. "That was the only time in seven and a half years that I've been in the passenger seat listening to music rocking out like this."

The video then cuts to a brief clip of Corden and Obama both singing Beyonce's "Single Ladies" together, hand motions and all.

The episode will air this Wednesday, July 20.