Usher filed for divorce from his wife of two years, stylist Tameka Foster, just a week ago — but you’d never guess it from the beaming smile the R&B crooner is sporting in this new “Got Milk?” ad for the Body By Milk nutritional campaign.

“The protein and nutrients in low fat milk help me build muscle and stay fit,” the “Nice & Slow” singer says in the ad.

Ush is currently putting the finishing touches on his still-untitled upcoming album, the follow up to his 2008 LP, Here I Stand.

(If you’re interested, SandraRose.com has a whole boatload of updates on Usher’s sure-to-get-ugly divorce from Tameka, 38.)