Star Tracker: Mariah Carey, Sofia Vergara, Nicole Richie, and more!

Mariah Carey’s voice is out of this world! A video of the part-Venezuelan superstar’s vocal range was uploaded onto YouTube and we are impressed at Carey’s capability. In roughly one minute, she sang 5 octaves, 2 notes, and 2 semitones, which – according to the video – is over 65 different keys! Listen to her voice here.

Star Tracker: Anahí, Jessica Alba, Jorge Ramos, and more!

— Rumors are circulating that Nicole Richie’s breasts may have gotten a bit of  a - err, boost. Us Weekly reports that the TV personality got a breast job this summer. Photos of her in a dark blue bikini surfaced recently – revealing much rounder and fuller breasted Richie than before. Richie’s rep has remained silent.

— The trailer for upcoming film New Year’s Eve, which stars colombiana Sofia Vergara, is out. The Emmy-nominated actress joins other stars in the romantic comedy – among them Jessica Biel, Halle Berry, and half-mexicana Sara Paxton. Check out the trailer here.

Sonya Walger has a new role. Best known for her work in the ABC series Lost and FastForward, the part-Argentinean actress is set to play a psychiatrist on the upcoming police drama Common Law. The show is set for a 2012 premiere on the USA Network.