Star Tracker: Zoe Saldana, Christina Aguilera, and William Levy

— Our cover girl Zoe Saldana loves to get whipped into shape at the gym. In an interview with Us Weekly, the part-Puerto Rican, part Dominican actress spoke about working with Hollywood-based trainer Steve Moyer. “We target whatever I want to target,” she said. “If I know I'm doing a movie and I need my thighs to get stronger, we start tackling exercises that strengthen the body.” Saldana, who showed off her sleek physique in Colombiana, told Us Weekly that she doesn’t like to work out alone. “I like to get grilled!” she said.

— Part-Mexican singer/actress Selena Gomez seems to be the apple of Justin Bieber’s eyes. According to OK Magazine, the 17-year-old singer revealed that he is “in love” with Selenita in an interview with new! Magazine. Here’s why: “Everybody can see she is hot and that’s great, but there is so much more to her than that,” Bieber said. “She makes me laugh and she puts up with my practical jokes.” The dirty blond crooner also spoke about one of their commonalities. “We were both raised by our moms in single-parent households,” he said, “and that’s given us a lot of the same family values in life.”

— Part-Ecuadorian songstress Christina Aguilera performed the ballad “Smile” at this past weekend’s Michael Jackson tribute concert. The Michael Forever concert was held at the Millennium Stadium in Cardiff, Wales, and according to Zap2it, many of Jackson’s siblings were there, including his three children. In addition to Aguilera, other artists who performed at the tribute concert include Leona Lewis, Ne-Yo, and Gladys Knight. After the tribute concert, 30-year-old Aguilera ran up a bar tab that summed up to a reported $8000 dollars, Zap2it reports.

— Part-mexicana Demi Lovato appeared in a recent photo with ex-boyfriend Wilmer Valderrama. According to Hollywood Life, the 19-year-old singer/actress posed with others at what appeared to be a Halloween party – and you can see Valderrama in the background looking into the camera a well. Check out the photo here.

— We’ve got another glimpse of Jessica Alba’s new baby – and Haven Garner is adorable! Baby Haven was out and about recently with her half-Mexican mami, daddy Cash Warren, and big sis Honor Marie. Check out the photo here.

Cubano William Levy is replacing Jorge Salinas in the musical Perfume de Gardenia, People en Español reports. The 31-year-old telenovela star will reportedly take over the Mexican actor’s role for several weeks while Salinas recovers from pneumonia. Levy will star alongside Mexican actress/model Aracely Arámbula.