Fun fact, Nelly nearly played major league baseball[0].
"St. Louis' very own rapper/actor/celebrity fitness guru was a breakout talent on the baseball diamond, finding solace and stability in the game after his parents divorced and he was forced to stay with a string of relatives. In high school, he was named the MVP of the St. Louis Amateur Baseball Association All-Star Game, and was scouted by the St. Louis Cardinals and Pittsburgh Pirates. But around the same time, he started his first rap group – the St. Lunatics – and scored a regional hit with the single "Gimme What U Got," which led him to pursue a career in music instead. Within a few years, he had the whole word wearing Band-Aids beneath their eyes and spelling things with double-r's, helping to put the Midwest on the hip-hop map."
The sticker is a shoutout to his baseball days, imitating the eye-black[1] commonly worn by baseball players.
[0] https://www.rollingstone.com/music/music-lists/9-musicians-w...
[1] https://www.dickssportinggoods.com/f/eye-black-athletes