Christina Aguilera closed Opening Ceremony's Spring 2019 show with a surprise performance during New York Fashion Week, emphasizing the brand's celebration of LGBTQ+ culture by performing 'Fall In Line' alongside prominent drag queens.

Christina Aguilera became an ambassador for Nintendo in 2021, starring in a campaign that featured her children playing the Nintendo Switch. This partnership highlighted her long-standing connection with the brand and included her family members in the promotional content.

Christina Aguilera performed at Dolce & Gabbana's Alta Moda welcome party in Sardinia, Italy, where she impressed guests with a pink performance featuring her classic song 'Lady Marmalade.' She wore a custom pink corset and matching boots designed by the brand, showcasing her long-standing appreciation for their designs.