How did Christina aguilar become Spanish?

Christina Aguilera is not Spanish. She was born in the United States to an Ecuadorian father and an Irish-American mother. While she has expressed admiration for Latin American culture and music, her heritage is not Spanish.

It's possible you're thinking of her frequent use of Spanish in her music and performances, which has led to some confusion about her ethnicity. She's a vocal advocate for Latinx representation and has collaborated with many Latin American artists, but she has never claimed to be Spanish.