The 36-year-old singer paid tribute to the iconic singer - who passed away in February 2012 aged 48 - at the annual ceremony by performing a number of song from her 1992 movie 'The Bodyguard' in honour of the film's 25th anniversary.
Clips from the movie, which also starred Kevin Costner, were played out on the screen as Christina sang 'I Will Always Love You', followed by 'I Have Nothing', 'Run To You' and 'I'm Every Woman', earning a standing ovation from the audience at the end.
Christina later thanked Whitney's ''beautiful family'' for giving her permission to perform the tracks, admitting the segment was a ''dream come true''.
In a video posted on Twitter, she said: ''To the AMA's to Whitney's beautiful family, thank you so much for this incredible opportunity. Thank you so much for making a little girl's dream come true. I've had the time of my life.
''I hope I did you proud Whitney. Love you forever.''
Christina - who has son Max, nine, with her ex-husband Jordan Bratman, and Summer, three, with fiance Matthew Rutler - also shared images of her on stage on her Instagram account.
The string of photographs were captioned: ''honoring an angel @amas this Sunday
''@amas tonight at 8/7c on abc #WhitneyxChristina (sic).''
The 'Candyman' singer later shared a picture of her sprawled out across a bed, wearing a black mesh embroidered bodice, and hinted she was still overwhelmed by the moment.
She titled the post: ''still reeling... (sic).''
And following her performance, fellow musicians took to social media to praise Christina, including Pink, who admitted she is ''in awe'' of the star.
The 'What About Us' artist tweeted: ''Christina f***ing killed it tonight for one of our favorite singers ever. This about Whitney, and I am in awe of Christina's talent. (sic)''
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