Photos of the Week: Lady Gaga, Kanye West, Amy Winehouse, Justin Bieber
Rihanna flaunts a new hairdo and a hot date -- baseball player Matt Kemp -- at a Jan. 16 Los Angeles Lakers game.

In the midst of all the holiday engagements and births comes one bit of sad news -- Rihanna and her boyfriend of nearly a year, Matt Kemp, have gone their separate ways, according to multiple reports.

The 22-year-old pop star and pro baseball player broke up "over the last few weeks," a source tells UsMagazine, adding that Rihanna "basically was just over it." JustJared and PerezHilton also reported on the split.

The source says Rihanna and Kemp's breakup was due mostly to the singer's "busy" itinerary. "He just can't keep up with her crazy travel schedule," the source says. "Matt's sick of always following her like a puppy dog all over the world. Her wants something more normal."

Rihanna began dating Kemp, a 26-year-old outfielder for the Los Angeles Dodgers, in January while working her 2009 album, "Rated R," and spent the latter half of this year promoting her latest release, "Loud." The coupling was the singer's first since her long-term relationship with Chris Brown, which ended in violence when Rihanna was assaulted by Brown in February of 2009.