Guests were also treated to a special performance by Dancing with the Stars cast members, the lighting of Christmas tree and a fireworks finale.
“When my mom tweeted this for me years ago… And now both of our dreams are actually coming true tonight 😳🎄❤️ @macfarlaneseth #GROVECHRISTMAS,” Meghan shared on Instagram before her performance.
FYI: Katharine is wearing a Shona Joy dress.
55+ pictures inside of Seth MacFarlane, Katharine McPhee, Meghan Trainor and more…More Here! »