Rihanna + Ashton Kutcher Have Been Hooking Up Since December

Rihanna sure is a busy girl. On top of working and partying, apparently the 'Birthday Cake' singer has been juggling gentlemen as well. Rumor has it she and Ashton Kutcher are not only currently hooking up, but that their trysts have been going on for two months.The pair first became friendly at a mutual pal's party in December. "The flirting began as soon as Rihanna and Ashton met and swapped numbers," a source told the Sun. That moved on to texts and arranging to meet. They snuck off to a Santa Monica hotel a few weeks ago." Ow ow!

So is it serious? Not so much, but friends say they wouldn't rule it out in the future."They are two single people having a fling, so thought it would be best to meet in secret," the source said.  "Rihanna has told friends he's funny and cute. Both of them love a good time and think they're too busy for anything serious just yet."

However, RiRi is start to study up on Kutcher's beloved Kabbalah just in case things do take a more committed turn. "She's starting to inquire about Kabbalah sessions with his rabbi," the spy said. "She is curious about Kabbalah so has started asking questions. She's open to new things and has always been a very spiritual girl. If she and Ashton are getting really close, she wants to be able to understand it."

We wonder how her "#1 Love" and fellow rumored hook up Chris Brown feels about this. At least he has his girlfriend to comfort  him, right?