The divorce between pop star Christina Milian and "The-Dream" has turned nasty -- all because of Justin Bieber.

RadarOnline.com has exclusively learned music producer Terius "The-Dream" Nash wants to back out of an agreed deal with his soon-to-be ex-wife that would have given her 10 percent of his earnings on Bieber's hit 'Baby' -- which he co-wrote.

COURT DOCUMENTS: Read Christina Milian's Motion To Enforce Settlement Agreement

Now Milian has gone to a Georgia court attempting to have a judge enforce a settlement agreement the pair struck in October, last year.

Her marriage may be over, but singer Christina Milian was all smiles as she held her adorable baby daughter Violet on Sunday, and RadarOnline.com has the just released pics.

PHOTOS: Christina Milian Taking Baby Steps After Marriage Break-Up

Milian was snapped in Toluca Lake, California, which is near Los Angeles, spending time with her mom/manager Carmen Milian and with music exec Big Billy Clark.

After photos surfaced Monday of Christina Milian’s husband The Dream frolicking on the beach with another woman, a rep for the rapper released a statement revealing the couple have separated.

PHOTOS: Who's That Girl? The Dream Romps On Beach Without Wife Christina Milian

Only a month after denying there was trouble in paradise, music producer Terius 'The Dream' Nash was snapped in the Caribbean romping on the beach with someone other than his wife. According to UsWeekly, the mystery woman is Melissa Santiago who has been Nash’s assistant for about a year.

PHOTOS: Celebrity Cheaters

In the photos,  Nash and Santiago are frisky with each other, with Nash grabbing her butt at one point. He also spins her around for a dance on the beach. Besides Milian being noticeably absent, so was Nash’s wedding ring.

PHOTOS: Hollywood’s Nastiest Divorces

Nash and Milian has two weddings- on  in  September 2009 and a ceremony in Rome in December. The couple has a 5-month-old daughter Violet. "Terius 'The-Dream' Nash is saddened to announce that his marriage to Christina Milian was unsuccessful. The couple reached this decision in late 2009, but decided to keep the news private in efforts to protect their baby daughter Violet. They ask for consideration and respect for their family moving forward," his rep tells UsWeekly.

Only a month after denying there was trouble in paradise, music producer Terius 'The Dream' Nash is snapped in paradise - the Caribbean - romping on the beach with a mystery woman, and not his wife, singer Christina Milian.

PHOTOS: Who's That Girl? The Dream Romps On Beach Without Wife Christina Milian

In the photos, we see the couple acting extremely frisky with each other, and even appearing to dance on the beach. Besides Milian being noticeably absent, so was his wedding ring.