Christina Aguilera knows that there is no other man for her.

The “beautiful” singer spoke about her feelings for her fiancé, Matthew Rutler, in honor of his birthday on Monday April 5th. She shared a glimpse into her private life at home in a slushy Instagram post that featured a video montage of her most romantic moments set on the Schitt’s Creek love song “Simply the Best”. ”

Christina, 40, wrote, “You’re just the best @m_rutler! Happy Birthday … You keep impressing me with how dedicated, motivated, and hardworking you are while being a devoted, loving, and thoughtful parent and partner are. “

She continued, “You always strive to get better and are never satisfied with anything else. From an amazing father to an incredible businessman and thought leader, you innovate and execute ideas on a daily basis.”

Xtina is mother of Max, 13, with ex-husband Jordan Bratman and summer, 6, with Matthew.