{blackbabes} The Real Reason Rihanna Missed Katy Perry's Wedding

Well, at least she made it to the bachelorette party.

When Katy Perry exchanged vows with Russell Brand over the weekend, the "Teenage Dream" singer's close pal Rihanna was surprisingly nowhere to be found.

That's surprising, considering the Grammy winner and boyfriend Matt Kemp were on the guest list for the big shindig in India.

So why the no-show?

Turns out it simply came down to a conflict with Rihanna's work schedule, a source close to Kemp tells E! News, and that the decision not to attend was "a last-minute change of plans."

"He was telling me [last] Saturday that he was leaving the country for a week with Rihanna," the source explains. "But then on Tuesday, he told me they weren't going."

A rep for Rihanna had no comment.