For a music fan, growing old with their favorite band is a dream come true. The reality, however, is a lot less fun. Bands and groups tend to break up for a lot of reasons - creative and personal differences, financial squabbles, or simply calling it quits.

Although many music groups don't last forever, sometimes the different paths that members take still meet up somewhere down the road. Here are four groups that have broken up but reunited later on.

OutKast

The duo of André 3000 and Big Boi started when the high school pals when they decided to form OutKast. They have allowed each other to do what they want with the double album "Speakerboxxx/ The Love Below" in 2003.

OutKast
(Photo : Wikimedia Commons)

After their sixth album "Idlewild" in 2006, both artists announced plans to release their solo albums under their respective names, unlike the OutKast double album. Big Boi released his solo debut "Sir Lucious Left Foot: The Son of Chico Dusty" while André 3000 worked on a large number of tracks, but never releasing his album. André also portrayed Jimi Hendrix in a 2014 biopic.

Late in 2013, however, fans were thrilled to hear a familiar name in the 2014 Coachella lineup. OutKast performed at the music and arts festival, followed by 40 more festivals worldwide in celebration of the duo's 20th anniversary.

Fall Out Boy

There was no serious fighting within the band. Instead, the group grew disillusioned with the entire music industry - they were on non-stop touring schedules, with some stops field with disrespectful concertgoers who booed them. Also, Pete Wentz clarified that it was not a break-up or a hiatus, but a much-deserved break: Fall Out Boy was "decompressing."

While the break gave the band time to focus on their other activities, such as playing with side projects, it was generally difficult for all members. Drummer Andy Hurley talked to Rolling Stone about the depression he went through, Wentz was divorced by his wife and had to return to therapy. Although lead vocalist Patrick Stump was able to release an album all on his own, it failed commercially, and he was harassed by "fans."

After reluctantly meeting up again, the band found support and encouragement from one another and got back together, stronger even. Fall Out Boy made a surprise return in 2013 with "Save Rock and Roll," debuting right at the top of the Billboard 200 and was critically acclaimed by critics.

No Doubt

No Doubt has had a long history of it all, being formed in Anaheim in 1986, its first hiatus in 2004, and the second hiatus in 2013. The band was highly successful in the 90s and the early 2000s, having released their compilation album "The Singles 1992-2003" followed by the release of their Rock Steady tour in DVD format.

In 2004, the band went into a hiatus, and Gwen Stefani released her debut album "Love. Angel. Music. Baby," which was heavily influenced by 80s pop music. Bassist Tony Kanal also worked on projects outside the band, such as creating songs for the movie "50 First Dates," and collaborating with Weezer and Pink.

Stefani returned to the band, participating in their 2009 Summer Tour and the release of their sixth studio album "Push and Shove" in 2012. By October 2013, lead guitarist Tom Dumont announced on Twitter that the band was on hiatus once again.

Backstreet Boys

Formed in Orlando, Florida, the Backstreet Boys became a staple in the playlist of every 90s kid. From their self-titled debut album in 1996, Nick Carter, AJ McLean, Howie Dorough, Brian Littrell, and Kevin Richardson have enjoyed a level of fame and success few can match. Creative differences and a bit of a legal turmoil have set the boys on separate paths before being reunited.

Backstreet Boys
(Photo : Wikimedia Commons)

In 2002, most members wished to leave their management company, except for Carter. The then four-member group started creating new material without him, and soon after, a legal battle ensued. In November 2003, McLean appeared on television and discussed the struggles he experienced as an international star, and all members of the BSB appeared to show support.

The group returned to work together in 2004 and launched a series of touring schedules around the world. After their "Never Gone Tour" ended in 2006, it was Richardson's turn to leave the group "to pursue other interests," but would return to complete the original lineup in 2012.