Jon Marco is chasing a girl in the cheerful music video for Rhianna, and the object of his affection flees through some of the greatest flicks of the 1980s, from Back to the Future to Tron to Return of the Jedi.

Today in Tweet Beat, most celebs are obsessed with the royal wedding, but not as much as Katy Perry, who had different members of the royal family put on her nails.

Today in Tweet Beat, Celebs like Snoop, Rhianna and Steve Martin observe the day of weed.

• Director Roman Polanski has been arrested by Swiss police, at the request of the United States, after he tried to enter Switzerland to attend the Zurich Film Festival, where a tribute to his work is taking place. [CNN]

• Shia LaBeouf on his mommy comments: "It was Mother's Day coming up and I don't have any problems appearing crazy to make my mother smile, but she is the most beautiful woman on this planet and I love her. [Extra]

• Paris Hilton and Doug Reinhardt were kicked off of a yacht due to "inappropriate" behavior. The couple were making out, to the dismay of other passengers ,who cheered when the captain tossed them off. [Mirror]

• Oh, yikes. According to Stephanie Pratt her brand new sister-in-law, Heidi Montag wants "four boys, four Spencer Pratts!" Creepy flesh colored beard enthusiasts across the country are no doubt celebrating this slightly terrifying news. [USWeekly]

• Claire Danes and her boyfriend, actor Hugh Dancy, are engaged to be married. Both Jordan Catalano and Brian Krakow are extremely bummed right now. No word yet on how Tino feels about all this, though.[People]

• Oprah Winfrey has been selected as this year's "Person of the Year" by PETA, for using her various media outlets to give "powerful voice to defend those without one." Maybe next year, Lindsay! [People]

• Guy Richie and Madonna have agreed to put their custody battle aside for one day in order to spend Christmas at Richie's estate, so that their children can spend the holiday with both parents. [DailyMail]

The Oscars were a snooze. The MTV Movie Awards were a disgrace. The Bravo A-Lists were a farce. Thank God for the BETs. A great red carpet is made up of elegance, panache, star power and just a pinch of exhibitionism. And the BET Awards, held at LA's Shrine Auditorium last night, had it all, kids. Rihanna, Jennifer…