"Crazy" is a famous ballad composed by Willie Nelson and first recorded by Patsy Cline in 1961.

"Crazy" is the fourth single from Simple Plan's second studio album, Still Not Getting Any.... The video of the single starts out in black and white. As it reaches the end, it slowly changes to color, symbolizing that no matter how grim life is, it will get better.

"Crazy" is a song performed by American hard rock band Aerosmith and written by Steven Tyler, Joe Perry, and Desmond Child. It was the final single from Aerosmith's wildly popular 1993 album Get a Grip. It was released as a single in 1994 and peaked at #17 on the Billboard Hot 100 and #7 on the Mainstream Rock Tracks chart.

"Crazy" is the first single from Gnarls Barkley, a musical collaboration between Danger Mouse and Cee-Lo, and is taken from their 2006 debut album St. Elsewhere. It became a top ten hit throughout Europe, North America and Oceania, in the first half of 2006, reaching number one of the single charts in the United Kingdom, Ireland, Denmark, Canada, New Zealand and other countries.

The song was leaked in late 2005, months before its regular release, and consequently received massive airplay on BBC Radio 1 in the United Kingdom, most notably by radio DJ Zane Lowe, who also used the song in TV ads for his show. When it was finally released in March 2006, it became the first single to top the UK charts on download sales alone. The song remained at number one in the UK Singles Chart for nine weeks (which no other song had achieved in over ten years, and was only surpassed by Rihanna's "Umbrella" in July 2007) before the band and their record company decided to remove the single from UK stores so people would "remember the song fondly and not get sick of it." In spite of this deletion the song became the UK's best selling single of 2006.

The song won a 2007 Grammy Award for Best Urban/Alternative Performance, and was also nominated as Record of the Year, which it lost to "Not Ready to Make Nice" by the Dixie Chicks. The song was also named the best song of 2006 by Rolling Stone and by the Village Voice's annual Pazz & Jop critics poll.

"Crazy" is a song written by English soul artist Seal (music and lyrics) and producer Guy Sigsworth (music only). The song was produced by Trevor Horn for Seal's debut album Seal (1991). Seal's debut single, "Crazy" is one of his biggest hits, reaching the top five in the United Kingdom and the top ten in the United States. It since has been covered by several artists, including Alanis Morissette, whose version was released as a single from her album The Collection (2005).

"Crazy" is the title of a number-one R&B single by The Boys. The hit song spent one week at number-one on the US R&B chart and also reached #29 on the Billboard Hot 100.

"Crazy" was the second single released off Leah Haywood's debut album Leah during the third quarter of 2000 in Australia. The song is co-written by Leah and A. Carlsson where it talks about a person falling for someone driving them "crazy". This single did not achieve the same amount of success as her first single "We Think It's Love" becoming only a moderate top 40 hit on the Australian ARIA Singles chart where it debuted and peaked at #31.

The single for Crazy also contained a a B-side track titled "Do You Know" that did not appear on the album, which was also co-written by Leah and Barbara Griffin. Both have worked together previously on the track "And If I Could" which appeared as a B-side on the CD single of "We Think It's Love". The release of this single also came with a set of bonus stickers of Leah as well as an enhanced component featuring the Crazy music video and a weblink to her official website and record company-related sites.

"Crazy" is the third single from Sydney band Expatriate's debut album In the Midst of This. It came in at #4 most played song at Australia radio on the 26/03/07 chart. Promo CDs were issued of the song to radio stations however a physical single was never issued.

Crazy is the 2nd single from Unexpected. It features raps by Pitbull.

Crazy was a single released in 2003 by the girl group, Dream. It was the group's last single before they finally broke up. It was also the only released single to feature the group's new member, Kasey Sheridan. It also featured a guest appearance by rapper Loon.

The music video took place in a Middle Eastern setting. It showed the girls wearing harem-like costumes and dancing in a very provocative style. According to MTV News, this new "sexed-up" style was not welcomed by the group and was one of the factors that led to their break-up .

"Crazy" is the name of a 1984 single by British pop group Five Star. It was their third single and would later be included on their 1985 debut album Luxury of Life. It was written by Gary Bell (who co-wrote their later hit "System Addict"), and Anne Dudley, one of the UK's top female songwriters and composers.