One way to keep the spark alive is to keep getting married! Jennifer Lopez and Marc Anthony did just that this weekend by saying "I do" again in Las Vegas. The couple, who've been married since 2004, renewed their vows with another couple, New York Met Carlos Beltran and his wife, Jessica. After winning at craps at Caesars Palace and catching a Pussycat Dolls show, both couples headed to the Forum Tower penthouse and met the minister at around 3 a.m. Sunday morning. Carlos and his wife renewed their vows first, followed by Jennifer and Marc at around 3:30 a.m. At 4 a.m., the ceremony was over and the newly wedded (again) couples celebrated with Dom Pérignon Rosé champagne.