Hip-hop mogul Russell Simmons and his current squeeze, model Hana Nitsche, have been seen in so many sultry yoga poses on the beach in St. Barts this week that A-list vacationers have been left wondering if they are also ticking off the Kama Sutra in their spare time. Meanwhile, Simmons’ voluptuous ex, Kimora Lee Simmons, has been seen separately vacationing with their kids, Ming and Aoki, on the island. Also seen on starry St. Barts: Jon Bon Jovi and his family at the Guanahani Hotel and Diddy chilling on Onassis, the enormous yacht that’s moored off the island. Celebrity stylist Rachel Zoe, meanwhile, celebrated Christmas over lunch with designer Brian Atwood at the Hotel Taiwana.