NEW YORK >> “Don’t Look Back in Anger” is good advice for the Britpop band Oasis, who launch their surprising reunion tour this week in Cardiff, Wales.

Led by brothers Liam and Noel Gallagher, the reunion marks the end of the siblings’ long-held feud, one that led to Oasis disbanding in 2009. For many fans, this news is almost too good to be true. They’re anxiously awaiting whether the Gallaghers will indeed make it through the entire run of international dates and even perhaps extend the reunion.

Whether they’re in it for the long haul or will call it quits at some point sooner, here’s a look at a few other very famous — but very brief — band reunions.

The Beach Boys

DISBANDED >> Technically, they never broke up.

HOW LONG THE REUNION LASTED >> A few months in 2012.

WHAT HAPPENED >> There is no linear history when it comes to The Beach Boys, but here’s the abridged: Band members came and went, and the band’s visionary, the late Brian Wilson, retired from touring in 1964 following a breakdown caused by stress and exhaustion. His place was soon filled by Bruce Johnston, who remained with the group for decades. Wilson also infamously feuded with his cousin and bandmate Mike Love over songwriting credits for years.

The question here is: Can a band that never broke up reunite? In this case, yes: The band — with both Wilson and Love — got together for a new album, “That’s Why God Made the Radio” and world tour in 2012, celebrating the band’s 50th anniversary. It wasn’t the whole original lineup, however: Drummer Dennis Wilson died in 1983, and guitarist Carl Wilson died in 1998.

CHANCES OF GETTING BACK TOGETHER >> The force behind the band, Brian Wilson, died last month at age 82, but Love continues to tour under The Beach Boys name.

Led Zeppelin

DISBANDED >> 1980

HOW LONG THE REUNION LASTED >> Good question. The band played a few one-off events in the mid-1980s throughout the ’00s, never embarking on a reunion tour. So, a few days? A few hours?

WHAT HAPPENED >> Led Zeppelin disbanded immediately following the death of drummer John Bonham in 1980, reuniting only for a select few events in the decades that followed. Most notably, their first show back was a complicated set at Live Aid in 1985 in Philadelphia. Their last performance together was in 2007 at the Ahmet Ertegun Tribute Concert held in London’s O2 Arena. There, Bonham’s son Jason Bonham played the drums.

CHANCES OF GETTING BACK TOGETHER >> Highly unlikely. Lead singer Robert Plant and guitarist Jimmy Page have successfully evaded reunion requests in the past, including one from President Bill Clinton. In 2013, Clinton asked the British rock greats to get back together for the 2012 Superstorm Sandy benefit concert in New York City. He asked; they said no.

Nirvana

DISBANDED >> 1994

HOW LONG THE REUNION LASTED >> A series of one-off performances in the 2010s and 2020s.

WHAT HAPPENED >> Nirvana disbanded following the death of frontman and principal songwriter Kurt Cobain. Its members pursued other projects — most notably, drummer Dave Grohl founded the Foo Fighters. But two decades after Cobain’s death, in 2014, Nirvana was inducted into the Rock & Roll Hall of Fame, so bassist Krist Novoselic, touring guitarist Pat Smear (of the Germs) and Grohl got together for a short set — joined by Lorde, St. Vincent, Joan Jett and Kim Gordon on vocals for a reunion dubbed “Hervana.”

CHANCES OF GETTING BACK TOGETHER >> Maybe there could be a few more gigs here and there? Novoselic and Grohl reunited for a few one-off performances in the years that followed, most recently coming together for the Fire Aid benefit concert in Los Angeles and the 50th anniversary celebrations for “Saturday Night Live,” both this year. At the latter, Post Malone took over vocal duties.

Oasis

DISBANDED >> 2009

HOW LONG THE REUNION IS SUPPOSED TO LAST >> If the band makes it through their full run of reunion shows, July through November. So, five months.

WHAT HAPPENED >> Good question. The band — and in particular, the Gallagher brothers — have not released a public statement giving specific reasons for the reunion. But the initial tour announcement did seem to allude to past tensions. “The guns have fallen silent,” Oasis said. “The stars have aligned. The great wait is over. Come see. It will not be televised.”

In 2019, Liam Gallagher told the AP he was ready to reconcile.

“The most important thing is about me and him being brothers,” he said of Noel. “He thinks I’m desperate to get the band back together for money. But I didn’t join the band to make money. I joined the band to have fun and to see the world.”

Fans had long theorized a reunion might be on the horizon, too: In the wake of the 2017 bombing that killed 22 at an Ariana Grande concert in Oasis’ hometown of Manchester, Liam Gallagher performed at a benefit concert. He criticized his brother’s absence, but a spokesperson said Noel Gallagher couldn’t attend because of a long-standing family trip. Benefit organizers said Noel Gallagher approved the use of Oasis’ music and donated royalties from “Don’t Look Back in Anger” to the British Red Cross’ One Love Manchester fund.

CHANCES OF GETTING BACK TOGETHER >> It’s happening. A better question is: What are the chances of a new album? That’s impossible to know.