'Don't Fail Me Now' serves as the X Factor USA winner's first single since winning the show in December 2011.
Listen to 'Don't Fail Me Now' below:
The singer previously released a dance cover of Otis Redding's 'Respect' as a free download in support of the Super Bowl XLVI.
'Don't Fail Me Now' will feature on Amaro's forthcoming, as-yet-untitled debut album, which follows later this year.
The star recently said that she is drawn to songs that reflect "real life scenarios", adding: "I look for songs that are connected to real-life scenarios - love songs, break-ups, getting hurt, finding the strength to keep on pushing in life."