"Halfcrazy" is the lead single from Musiq Soulchild's second album Juslisen. It was released as a 12" single on February 26, 2002. "Halfcrazy" contains an interpolation of the Charlie Byrd song "Vivre Pour Vivre", a cover of the Francis Lai composition. It is considered as Musiq Soulchild's signature song.

"Halfcrazy" debuted on the Billboard

Billboard (magazine)

Billboard is a weekly American magazine devoted to the music industry, and is one of the oldest trade magazines in the world. It maintains several internationally recognized music charts that track the most popular songs and albums in various categories on a weekly basis...

Hot R&B/Hip-Hop Songs

Hot R&B/Hip-Hop Songs

Hot R&B/Hip-Hop Songs, is a chart released weekly by Billboard in the United States.The chart, initiated in 1942, is used to track the success of popular music songs in urban, or primarily African American, venues. Dominated over the years at various times by jazz, rhythm and blues, doo-wop, soul,...

 chart on February 23, 2002, and peaked at number two in a 42 week stay on the chart. It entered the Billboard Hot 100

Billboard Hot 100

The Billboard Hot 100 is the United States music industry standard singles popularity chart issued weekly by Billboard magazine. Chart rankings are based on radio play and sales; the tracking-week for sales begins on Monday and ends on Sunday, while the radio play tracking-week runs from Wednesday...

on March 23, 2002, peaking at number 16 in a 25 week chart run. It is the biggest pop hit of Musiq Soulchild's career.