TMZSports.com
Exclusive Details

Nick Young Serenades Baby Mama ... On Fancy Date Night

You know how we know things are getting serious between Nick Young and his baby mama (besides the 2 kids they have together?) ... he's singing to her!!

Swaggy P took Keonna Green out to Catch in West Hollywood -- the hottest restaurant in town.

But after dinner, Young busted out the pipes and sang a little B2K and old-school Beyonce.

Remember, Swaggy got back with Keonna when he knocked her up last year -- while still engaged to Iggy Azalea.

Iggy's moved on ... and Swaggy seems happy -- so, for the best???

Click here for info about our online advertising practices.