Which Rihanna Collaboration Is Your Favorite?

This morning, Rihanna added another A-list collaboration to her lengthy résumé list. After RiRi and Britney Spears announced via Twitter this weekend that they did a remix of the Loud single, "S&M," the song hit the radio and Net. And, inevitably, we began recalling Rihanna's other partners in crime.

But, Brit is hardly the first superstar that RiRi has hooked up with. In fact, she has a pretty extensive list of features and collaborations. In the last 12 months, she's skyrocketed to the top of the charts with her Eminem collabo, "Love the Way You Lie," which appeared on the rapper's hit album Recovery. He returned the favor dropping a verse on her answer to the track on "Part 2" which appeared on Loud. Her one-time rumored beau, Drake, also made an appearance on the album, getting very, very sexy on the single "What's My Name?," which also hit #1 on Billboard.

She's worked with her mentor Jay-Z on multiple occasions: first on her smash hit "Umbrella," and then again on "Run This Town," which also featured Kanye West.

Rihanna and Yeezy teamed up again on his 2010 track, "All of the Lights," as she stood out from the pack of many famous voices in the song.

Speaking of ladies who made the final cut onto My Beautiful Dark Twisted Fantasy, Ri and Nicki Minaj have also lent their vocals to each other's tracks: "Fly" on Nicki's Pink Friday and "It's Raining Men" on Loud.

Rihanna's also went to "Rehab" with Justin Timberlake, traded flirty barbs with Maroon 5 on "If I Never See Your Face Again," got the party started with T.I. on "Live Your Life," took a course in "Rockstar 101" with Slash, went "Hard" with Young Jeezy, pined over Ne-Yo on "Hate That I Love You" and decided to "Break It Off" with Sean Paul.