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Syco / Columbia (past) Past members. Alex Kinsey. Sierra Deaton. Alex & Sierra were an American duo consisting of Alex Kinsey (born September 8, 1991) and Sierra Deaton (born February 11, 1991), who won the third and final season of The X Factor US. They were mentored by Simon Cowell.
Stream Alex & Sierra - Gravity (The X Factor USA Performance) by Alex Sierra HQ on desktop and mobile. Play over 320 million tracks for free on SoundCloud.
Dec 13, 2013 · This is my favoite performance by the amazingly talented Alex & Sierra. PLEASE VOTE for the duo on the XFactor finals this Wednesday night on Fox! Enjoy!
- 3 min
- 77.8K
- Victoria
Alex & Sierra wanted to leave behind any doubt they belonged in The X Factor finals. Did their performance of Sara Bareilles' song, "Gravity,"