As 'Cheerleader' rules, OMI joins acts from M to U2 to Yes in keeping it simple at No. 1.

Atop the Billboard Hot 100 this week, less is more.

OMI's 'Cheerleader' Leaps to No. 1 on Hot 100

As previously reported, OMI's "Cheerleader" jumps to No. 1 on the tally (dated July 25). At three characters, OMI marks the shortest name for an artist (in a lead role) atop the Hot 100 in more than nine years. (Among all acts, it's the briefest moniker since Dev was featured on Far*East Movement's "Like a G6" in late 2010.)

OMI is short for the Jamaican reggae/pop singer's real name, Omar Samuel Pasley.

Among lead acts, here's an updated list of those that have kept it the shortest and sweetest at No. 1 on the Hot 100 for all-time, counting total characters in an artist's name (including punctuation, so, sorry, acts like T.I., B.o.B and a-ha). OMI joins eight other acts in trailing only M and U2 for the quirky honor:

Lead Acts With the Shortest Names to Top the Hot 100

Artist, Title, Year Reached No. 1

M, "Pop Muzik," 1979 (one character)

U2, "I Still Haven't Found What I'm Looking For," "With or Without You," 1987 (two characters)

OMI, "Cheerleader," 2015 (three characters)

D4L, "Laffy Taffy," 2006

B2K, "Bump, Bump, Bump," 2003 (with P. Diddy)

Mya, "Lady Marmalade," 2001 (with Christina Aguilera, Lil' Kim & P!nk)

Joe, "Stutter," 2001 (featuring Mystikal)

TLC, "Unpretty," "No Scrubs," 1999; "Waterfalls," "Creep," 1995

SWV, "Weak," 1993

EMF, "Unbelievable," 1991

Yes, "Owner of a Lonely Heart," 1984

How Do You Pronounce OMI?

Oh, and how about a standing O for OMI, the latest lead artist whose name begins with an "O" to reign o-ver the Hot 100. He joins Ohio Players, the O'Jays, the Osmonds, OutKast and Owl City. And, going by last names: Billy Ocean, Sinead O'Connor, Alan O'Day, Roy Orbison and Donny Osmond.

Counting first names, Olivia Newton-John and Otis Redding would be included, als-o.