Matt Kemp moving in with Rihanna

Russian Roulette singer delighted her boyfriend Los Angeles baseball star when she suggested that he live in her Hollywood mansion, just months after they started dating,

American singer Rihanna's boyfriend Matt Kemp is moving in with her.

The Russian Roulette singer delighted the 25-year-old Los Angeles baseball star when she suggested that he live in her Hollywood mansion, just months after they started dating, imdb.com reported.

"Matt is very happy to be moving in with Rihanna. He knew it was only a matter of time before Rihanna moved him in. He wants to make her happy," a source said.

"He had boxes of his things brought over in mid-March. He's training in Arizona now, but when he's back he'll be at her place," the source added.

Rihanna and Kemp, who were first romantically linked in January after their holiday together in Mexico, have always played down their relationship and claimed they are "just friends".

However, the sportsman recently introduced the 22-year-old singer to his family when she attended an autism charity fundraiser event he was involved with.