Whitney Houston was memorialized at last night's Billboard Music Awards in Las Vegas -- and if you missed Jordin Sparks' amazing version of "I Will Always Love You," you gotta see it now!

Sparks, who worked with the late singer on this summer's "Sparkle" remake, was the latest to cover Whitney's most memorable hit ... and her version even had Houston's daughter, Bobbi Kristina, getting emotional.

Jordin performed after John Legend sang a beautiful rendition of "The Greatest Love of All," leading up to a short and sweet speech by Bobbi -- who accepted the Millennium Award on Whitney's behalf.

"I just really want to say thank you to everyone who supported us through it all, not just from when it was good, but when it was bad, to just everything," Bobbi said in her speech.

"I’m just blessed to have been in such an incredible woman’s life. There will never be another one, ever.”

Watch the touching tribute above.