– Rihanna and Drake have long been an item, but, as TMZ puts it, they were just "casually hooking up"—until now. Sources say they're now an exclusive couple, and that Rihanna is spending all her free time with Drake because he treats her so well. Currently, they're spending every night together in Europe as Drake tours; the rapper is said to be "in the best mood he's been in a long time." In other celebrity romance news: Pussycat Doll Nicole Scherzinger is engaged to racecar driver Lewis Hamilton, according to the Daily Star. She had previously turned him down three times. Mötley Crüe bassist Nikki Sixx wed longtime girlfriend Courtney Bingham yesterday in LA, People reports. And Jamie Lynn Spears married James Watson on Friday in New Orleans, E! reports.