Tyson Fury easily defeated Tom Schwarz during the second round of a fight in Las Vegas, confirming his lineal heavyweight title.
After the bout, the winner sang Aerosmith's "I Don't Want to Miss a Thing" for his wife and happy fans.
The song also brought forth a real storm of comments on Twitter.
The boxer earlier sang the same ballad after defeating Wladimir Klitschko in Germany several years ago.
Fury, who is known as The Gypsy King, has won 28 fights (20 of them by knockout) since the beginning of his professional boxing career in 2008, remaining unbeaten. Last year he had his only draw during a fight for the WBC heavyweight title against Deontay Wilder.