President Barack Obama loves to serenade his wife by singing songs from Al Green, Marvin Gaye and other R&B great, the First Lady revealed Tuesday night, according to Daily Mail.

'He does have a beautiful voice, and he sings to me all the time,' Michelle Obama told 'The Tonight Show' host Jay Leno.

The president gained a little attention in January for breaking out a bar of an Al Green song during a fundraiser at the Apollo Theater in New York City.  But he also sings Marvin Gaye and even 'a little Stevie.' That's Stevie Wonder, for the uninitiated.  'He likes the classics,' she explained.

However, her appraisal of Republican front-runner Mitt Romney's choir voice was a little less generous. Romney surprised supporters in Florida with an off-pitch version of 'America the Beautiful' on Monday, and Leno asked the first lady for her opinion.

'It's beautiful,' she said after a pregnant pause, with a laugh and raised eyebrows. 'And it is America's song, and it's a song that's meant to be sung by every American,' the first lady said in a taped appearance for the NBC show. Leno told her, 'That is right, regardless of political affiliation.'