Cristiano Ronaldo -- The Champ Is Here ... Wet & Shirtless (PHOTOS)

Cristiano Ronaldo celebrated his championship the same way he won it -- very, very shirtless ... except now he's on a yacht.

The soccer star -- fresh off scoring the decisive penalty kick to give Real Madrid its 11th UEFA Champions League title -- was hanging with friends Sunday catching rays and a dip off the coast in Ibiza, Spain.

It's like he never got dressed after ripping off his jersey. And, honestly ... why should he?