Oasis is re-releasing their debut album Definitely Maybe with previously unheard tracks to celebrate the LP's 20th anniversary.

The band - who split in August 2009 after brothers Noel and Liam Gallagher had a huge backstage bust-up in Paris, France - sent the internet into meltdown yesterday after teasing an announcement at 9:00 am this morning, prompting speculation of a reunion. But instead they revealed plans to bring out a new version of their acclaimed debut record - which will be available from May 19. The anticipation of a possible reunion saw fans crash their official website oasisinet.com.

The re-issue is the first in the Chasing The Sun series from Big Brother Recordings - the brothers' own record label - with "What's the Story (Morning Glory)?" and "Be Here Now" also set to be re-released.

"There were no discussions at all about any anniversary shows. These reissues are the best way to celebrate, because all three albums have great extras," original Oasis guitarist Paul "Bonehead" Arthurs - who quit the group in 1999 - told NME magazine.

The re-issue will be available in a number of formats and packages, including a three-disc deluxe edition, featuring unheard acoustic versions recorded in Paris of "Live Forever" and "Shakermaker," along with an early demo of "Half The World Away," recorded by Noel in a hotel room in Tokyo, Japan, and a demo of rare song "Strange Thing."

The band's 1994 standalone single "Whatever" will be included as well as versions of all the B-sides from the album's four singles - "Supersonic," "Shakermaker," "Live Forever" and "Cigarettes & Alcohol." Definitely Maybe, which was produced by Owen Morris, sold 86,000 copies in its first week of sales in August 1994 and was the fastest-selling debut album in UK chart history until Arctic Monkeys' Whatever People Say I Am, That's What I'm Not beat the record in 2005.

The original line-up of Oasis that recorded the album was made up of singer Liam, guitarist and songwriter Noel, rhythm guitarist Bonehead, bassist Paul "Guigsy" McGuigan and drummer Tony McCarroll.