It was a big weekend for Carrie Underwood. After announcing an upcoming 'Greatest Hits: Decade #1' album, along with a brand-new single, 'Something in the Water,' the songstress performed in New York City's Central Park as part of the Global Citizen Festival.

The mom-to-be was part of a star-studded lineup, which also included pregnant Alicia Keys, Beyoncé, Jay Z and No Doubt, who were joined by Sting for one of his hits, 'Message In a Bottle.' Underwood performed for more than 30 minutes, and her set featured some of her biggest hits, including 'Cowboy Casanova,' Jesus Take the Wheel,' 'Good Girl' and 'Before He Cheats,' along with a cover of the R.E.M. tune 'Everybody Hurts.'

The Global Citizen Festival, which is part of the Global Poverty Project, works to eradicate extreme poverty by 2030, while also promoting volunteerism.

“They are so many causes,” Underwood says. “You can find something that you’re really passionate about.”

Underwood's 'Greatest Hits: Decade #1' album will be released on Dec. 9. She can next be found at the 2014 CMA Awards, where she will return as co-host, along with Brad Paisley, for the seventh year. She is also nominated for Female Vocalist of the Year, along with Musical Event and Music Video of the Year, for her duet, ‘Somethin’ Bad,’ with Miranda Lambert.

Download 'Something in the Water' here.