Victor Ortiz and Ray J have more in common than the fact they both took part in fights last weekend in Las Vegas -- they're teaming up to do a song together.
TMZ has obtained a track from DJ Ian Carey, which features Ray J singing ... and a short rap verse from Ortiz.
The song is called "Baddest Girl" and Ortiz comes in around the 2:02 mark. Listen and judge for yourself ...
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