He may be the host of The Bachelorette, but Chris Harrison is no single. He started his Las Vegas birthday celebration with a rose party at Blush Boutique Nightclub at Wynn Las Vegas on Friday. The star of the hit ABC reality show, who turned 39 this past Monday, arrived at the club with a group of 12 friends at 11:30 p.m. following dinner at SW Steakhouse. Harrison happily posed for pictures and gave roses out to female fans, but only had eyes for his wife Gwen, who partied right beside him at their dance floor VIP table. The group drank Grey Goose with mixers until 2 a.m. Harrison is expected at Surrender Nightclub at Encore Las Vegas tonight to continue his birthday celebration.