The "Genie in a Bottle" singer is a rotating judge with the pair on TV talent show "The Voice", and knowing how painful a split in the spotlight can be, Aguilera is supportive of the stars and their relationship, reported Us magazine.
"I do know from my own personal experience how difficult divorce can be," Aguilera, 34, said about her split from Jordan Bratman after five years of marriage.
"All I do know - from knowing Blake from so many seasons past... And knowing Gwen for even longer than that, going to each other's kids' birthday parties, etc. - they're great people."