Diddy & Lady Gaga -- Our LAWYER's the Toddler-Saving Hero from the Bulls Game

The heroic father who saved his daughter from a flying Chicago Bulls player last night ALSO has a history of saving the biggest celebs in the world -- including Diddy and Lady Gaga -- because he's ... THEIR LAWYER.

In case you missed the game -- a 6'7" 200-pound Bulls rookie named Tony Snell jumped into the stands for a ball ... nearly tackling a toddler ... but the little girl's father saved her at the last second.

The interesting part -- aside from the awesome save -- is that the father is Kenny Meiselas, a famous NYC attorney who has repped the likes of Diddy, Usher, Nicki Minaj, Lady Gaga, and Whitney Houston. Pretty cool.