PHOTOS: Seth MacFarlane, Meghan Trainor & Katherine McPhee perform @ The Grove Tree Lighting Concert’s Kelly Rosales was LIVE at The Grove shopping center in Los Angeles for their annual tree lighting concert. Attendees rang in the 2015 holiday season with “The Grove Christmas with Seth MacFarlane” on Saturday evening. Presented by Citi, the event included MacFarlane singing some of the holiday’s most cherished songs backed by a vibrant 70-piece orchestra. Special guests included Meghan Trainor and Katharine McPhee. Other activities included the annual lighting of The Grove’s 100-foot Christmas tree, a performance by The Top Hat dancers, the season’s first snowfall, the arrival of Santa Claus himself and a fantastic fireworks finale!