Star Tracker: Ricky Martin, Demi Lovato, Juanes and more!

— We’re sure there are plenty of fans upset at Ricky Martin. The 39-year-old Boricua singer had to cancel a concert in Neuquén, Argentina after suffering several muscle contraction pains. According to Latin Gossip, it is unlikely the show will be rescheduled.

— According to Colombian rocker Juanes, social media can help bring change. During his trip yesterday in Geneva in celebration of the United Nations’ International Day of Peace, the 39-year-old rocker opined that social media networks are tools for youth who want to spur political, cultural, and social change.

— Illusionist and stunt performer Criss Angel is apparently marrying a Latina. According to LALATE, the Greek-American (Criss Angel Mindfreak) is engaged to Sandra Gonzalez, his on and off again girlfriend of four years. Angel told a reporter that she is the love of his life.

— Though Demi Lovato’s new Unbroken album has received mixed reviews by critics, her fellow celebrities have given her a ton of positive feedback. The 19-year-old part-Mexican actress/singer received congratulatory tweets from ex-boyfriend Joe Jonas and friend Selena Gomez, who tweeted “Jamming to Unbroken in my car @ddlovato.” Selenita’s sweetie Justin Bieber also gave Lovato a shout-out to, tweeting that “our generation is doing it big.”

— It was about time Eddie Cibrian visited the Playboy Mansion. The 38-year-old Cuban-American star of The Playboy Club stopped by the fame property with wife LeAnne Rimes this week. The couple peered at enclosed monkeys at the Los Angeles estate – they were there to film a segment for Entertainment Tonight with Hugh Hefner, according to PeoplePets.com.