AceShowbiz - Singers Maren Morris and Kelsea Ballerini showed off their 'Country Strong' spirit during a joint work-out on Monday, July 02.

The two stars, who are on the road this summer with Keith Urban and Niall Horan, respectively, joined fellow country star Carly Pearce for an intense bootcamp session with celebrity trainer Erin Oprea in Nashville, Tennesse and appeared to have a blast if photos posted online by their coach are to be believed.

3 country singers walk into an @erinoprea workout...

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A post shared by Kelsea Ballerini (@kelseaballerini) on Jul 2, 2018 at 11:23am PDT

Lots of country booty kickin' today with @erinoprea 💦💦

A post shared by c a r l y p e a r c e (@carlypearce) on Jul 2, 2018 at 11:13am PDT

"I wish all of you could be a fly on the wall for this killer session, nothing but Sweat, Laughter, and Good music," she wrote under a snap of the three stars working out. "It really never happens that clients can workout together because everybody is ALWAYS so busy, so this was a BLAST!!