Rihanna is single again after splitting from baseball hunk Matt Kemp, according to U.S. reports.
Sources tell Us Weekly magazine the couple grew apart and ended its 11-month romance before Christmas (10).
The insider says, "(Rihanna has been) so busy, he just can't keep up with her crazy travel schedule... It was never as serious as it looked."
A spokesperson for Rihanna could not be reached for comment.
The Kemp romance was the singer's first since she split from Chris Brown following a fight in February, 2009.