The jig is up, you two!

David Foster and Katharine McPhee have downplayed those persistent dating rumors by claiming they're "just friends," but we caught them kissing at the ATM after a romantic dinner at Toscana in Brentwood last night. It certainly seems like they're a couple to us!

The 67-year-old music producer and the 33-year-old singer were linked just a few months ago, around the same time he was quietly seeing supermodel Christie Brinkley. This guy likes to play the field!

The American Idol alum doesn't really seem like his type, though, because he's got a thing for blondes. That said, he's totally her type! She has a thing for older dudes, and was previously married to a guy almost 15 years her senior.

Foster's daughter Erin got tongues wagging by calling McPhee her "stepmom" on Instagram and then claimed she was joking, but could that actually be happening? She's wearing a ring on her wedding finger, and we all know David likes to move fast! He's never single for long!