Rihanna Is Now a Kemp Woman

1/4/2010 7:56 PM PST
Rihanna is starting the new year with a new man ... LA Dodger Matt Kemp.

RiRi and Matty got up close and personal while vacationing in Mexico together this weekend.

Last week, Matt lied to our cameraman -- and adamantly stated the two were just "friends."

Ah yeah, yeah, yeah!