Justin Bieber — Flies Posse to Vegas … All About Floyd "Money" Mayweather

Justin Bieber just high tailed it to Las Vegas with his crew to walk Floyd Mayweather into the ring tonight … and they”re clearly expecting “Money” to kick ass.

Justin boarded with Lil Twist, Lil Za and a few others Saturday for Floyd”s fight against Saul “Canello” Alvarez — and most of his entourage were proudly sporting Mayweather”s Money Team shirts.

Worth noting … no visible puffs of smoke as they boarded the plane … this time.