Congratulations to LMFAO. The party-rocking duo scored another number one hit in the U.S. with “Sexy and I Know It.” With the group’s latest chart-topper, LMFAO entered an interesing group of artists that includes…

Rod Stewart (“Do Ya Think I’m Sexy”)

Right Said Fred (“I’m Too Sexy”)

and Justin Timberlake (“SexyBack”)

Those four acts are the only ones ever to have a song reach number one on Billboard chart with the word “sexy” in the title.