After the famous Miley Cyrus MTV VMAs 2013, Robin Thicke was photographed grabbing the ass of a hot blonde girl he met at an MTV party.

Thicke should have stuck to Miley Cyrus ' foam finger because since then things keep getting worse for admitted alcoholic Robin Thicke.

Now Robin Thicke's mystery woman says it wasn't just at the party.  21-year-old London hottie Lana Scolaro, says that she was Robin Thicke's mistress,

It seems that only last week, Robin confessed in court that he was so drunk and high while promoting "Blurred Lines" that he didn't remember much about his 2013 summer hit. Thicke said he didn't remember writing it. Saying Pharrell Williams probably did it. And that he had no memory that it might have been based on Marvin Gaye's "Got to Give It Up."

Robin might not even have remembered the blonde that he was photographed with at the VMAs after party. But she remembers Thicke. Lana Scolaro confirmed that she had sex with Robin Thicke.

Robin Thicke admitted to being the guy in the picture who grabbed Lana Scolaro's butt, but swears he didn't sleep with the girl.

In the Oct. 6 issue of Star magazine, Lana Scolaro said "We had sex at that party. We were among the first people to arrive in an elevator together and got to talking. We both got drinks at the bar, and Robin suddenly grabbed my hand and led me to a back room, where all the lights were off...It was really dark and no one was around. His hands were all over me...he started going down, and it just happened. It wasn't romantic, just really steamy and fast, like he knew he was doing something wrong."

Paula Patton and cheating Robin Thicke divorce isn't final.

Thicke recently tried to win back his high school sweetheart with a deeply personal album called "Paula," an entire album designed to win Patton back. The album was was a full long playing public apology. He even released a music video that featured a Paula Patton look-a-like. "Paula" flopped. It only sold 30,000 copies in the United States.Paula Patton recently posed topless for Vanity Fair Magazine.

Robin Thicke and Paula Patton split up after rumors and gossip about the Miley Cyrus VMAs 2013 performance.

Thicke told New York's Hot 97 radio station that cheating "is not why we're apart. We're apart because we just couldn't be together anymore for a while. There's a hundred different reasons, there isn't just one. There's a long list... I changed, and I got a little too selfish, a little too greedy and little too full of myself."