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Fans have heaped praise on Conor McGregor's "insane" difference after the UFC legend shared photos from three different weight classes on Instagram.

The Irishman took to social media to share a picture showing him flexing at weigh-ins for his fights with Jose Aldo and Floyd Mayweather alongside a current photo. McGregor is said to weigh around 190lb as he pushes towards a welterweight return in the UFC, as much as 45lb heavier than he was in his picture from the 2015 bout with Aldo.

He captioned the post "climb the ladder", and received a mixed reaction from fans. A large proportion of his supporters were complimentary, noting that he was looking good and strong in the recent picture, as opposed to gaunt in the 2015 snap. But some also brought up that his record was best at 145lb, including his iconic win at UFC 194.

"Yes sirrrr looking strong brother," said one fan, while one commenter added: "That’s actually insane the way he was able to dominate different weight classes like that."

McGregor became world champion at featherweight and lightweight in Cage Warriors, before getting signed to the UFC and emulating that feat within less than four years. To become featherweight champion in the