Gavin Rossdale was spotted hooking up with a mystery woman following his recent split from Gwen Stefani.

Gavin Rossdale and Gwen Stefani just announced the split two months ago. After the news broke out, another rumor came out that the estranged couple is going through a messy divorce as he is said to be demanding half of Gwen's fortune.

Now, it seems that the spilt is getting more messier as another report came out that Rossdale was spotted kissing a mystery brunette woman while having dinner at the Operation Smile 2015 Gala in Los Angeles last week. This is amidst the fact that he is still legally married to Stefani, Radar Online reported.

"Gavin brought a beautiful tall brunette woman to the event and, at first, it seemed that it was his publicist or something," the source revealed to the media outlet. "They came in together and sat next to each other at dinner, but made sure to keep their distance because they knew people were watching them. After drinks started flowing following dinner, Gavin followed her to the bathroom at the same time I was walking towards the restroom. She left the restroom just before I did and when I walked out, Gavin and her were kissing!"

The source also said that only two people saw Rossdale smooching the woman. The source further claimed that it was obvious that they want to keep the relationship a secret.

OK! Magazine recently reported that Gwen Stefani was not happy that Gavin has been spotted many times hanging out with their nanny since the split. The said nanny actually was the one that caused Gwen's jealousy before she broke up with her husband. After Gwen sensed that there is something going on between her nanny and Gavin, she reportedly fired her.

Since Gwen and Gavin split an insider said to OK! that the nanny was hanging out with him at his pad.