The news comes after rumors began to swirl late last week that Christina Aguilera would be performing a tribute to the late singer on The Voice after photos and videos surfaced on social media of a glammed-up Aguilera seen singing with Houston's hologram on The Voice stage.
Aguilera was tight-lipped when ET asked about the rumored "duet" ahead of Monday's live episode of The Voice, though it is unclear when the performance will air.
"I am sworn to secrecy," she stressed. "I can't say anything, but I'm very excited about the finale. Very exciting things happening."