To celebrate the 10-year anniversary of “All About That Bass,” Meghan Trainor did a show-stopping duet of the catchy tune with Kelly Clarkson.

During their fun version, the two sang along to the retro-inspired beat with pure sass. After the performance, Trainor described collaborating with Clarkson as “the best moment of her whole life.”

What to know about “All About That Bass” by Meghan Trainor

Trainor’s debut single, “All About That Bass” reached the number one position on the Billboard US Hot 100 charts in 2014 and was nominated for two Grammy awards, including Song of the Year and Record of the Year.

A decade later, Trainor spoke to Clarkson about why she loves being associated with “All About That Bass.”

“People would come up to me and say: ‘[That] song helped me love myself again.’”

Kelly Clarkson and Meghan Trainor appear on The Kelly Clarkson Show Episode 7I135. Photo: Weiss Eubanks/NBC