Christina Aguilera has found her favorite new harmony with family. The singer, 45, gave a rare glimpse into her personal life in a video shared via Instagram on Wednesday, March 26, which captured her special mom moments while making memories with her 11-year-old daughter, Summer, and fiancé Matthew Rutler, during a trip to Costa Rica. "📍La Paz Waterfall Gardens & Wildlife Refuge ... thank you for the wonderful tour and the breath of fresh air ☁️🩵🦋 pura vida xxx," she captioned the clip.