#3 Messi: "T-shirt aloft"
Let me break this to you first, Messi isn't the first to celebrate with t-shirt held high aloft in the air. Ronaldinho did the same celebration while he was playing for PSG back in 2002.
Nonetheless, Messi scored that day to snatch the win from Real Madrid in the dying minutes, making this celebration very special for all the Barca fans worldwide. Some pictures were taken at the right time making it look supernatural as it looks as if Messi is holding his t-shirt with one hand.
This celebration has been borrowed since then, by many players like Cristiano Ronaldo returning the favour after his goal against Barcelona later that year. Mauro Icardi and Nabil Fekir being the notable ones among many others. Even though Messi didn't do it originally it will be remembered as Messi's celebration because of the thrilling moments it gave to football fans.
This one is different to other celebrations on this list as it signifies respect towards the fans rather than the goal itself.
This celebration is pure class and forges a soothing effect even though there are chances of receiving a booking.