Shirtless Colton Underwood Celebrates Brother's Bachelor Party in Vegas!

Colton Underwood is happily shirtless as he flashes a smile alongside his brother Connor during their visit to JEMAA – The NoMad Pool Party held at Park MGM on Saturday (July 13) in Las Vegas.

The 27-year-old Bachelor star showed off his fit form while Connor opted to wear a t-shirt featuring a faux six-pack and g-string thong swimsuit painted on.

PHOTOS: Check out the latest pics of Colton Underwood

Colton threw a combo birthday and bachelor party for Connor and was joined by a group of 10 friends, including Gregg Sulkin, as they kept refreshed with a jaw-dropping Cocktail Explosion and tequila while enjoying next-level poolside plates including lobster rolls, falafel burers, dry aged burgers, quinoa bowls, fruit and fries.

Gregg is dating Colton Underwood‘s girlfriend Cassie Randolph‘s sister Michelle Randolph. They’ve become best buds in recent months – in April they stepped out for a double date together.