Jennifer Lopez and boyfriend Casper Smart waved to fans from the balcony of their Rio de Janeiro hotel yesterday. Jen's taking a short break from American Idol to participate in Brazil's Carnival celebration. The couple have had their fair share of fun at the beach in recent days, after Jen and Casper spent Valentine's Day together in Malibu. J Lo and Casper are among the many celebrity guests in town for the annual parade. She's not expected to perform or participate in Carnival, but beer company Brahma is promoting Jennifer as their special VIP guest. Back in the States, Jennifer will star in two primetime shows on Fox starting next month. In addition to Idol, her reality show with ex Marc Anthony, ¡Q'Viva! The Chosen, will begin airing on March 3.