"Hit the Floor" star Stephanie Moseley is dead after her her rapper boyfriend , a member of Floyd Mayweather's Money Team -- shot her and then killed himself .We're told residents at a swanky L.A. apartment complex near The Grove heard shots ring out early Monday morning. The SWAT team raced to the scene and knocked down the door of an apartment ... and found 2 people shot to death.

The rapper Earl Hayes -- who was once signed to Mayweather's record label  often partied with Floyd. Moseley has been a backup dancer with numerous singers, including Chris Brown and Britney Spears.
Residents heard a woman screaming in the apartment before shots rang out.
Sources connected with Moseley and Hayes tell  he had accused her of infidelity with a famous singer.