The 'Don't Look Back In Anger' hitmakers split in August 2009 following an argument between the siblings- something Liam is now pleased about.
Speaking to The New York Post, Liam said: "In hindsight it was the best thing that's ever happened, because we're free to do whatever we want."
Discussing his recently release clothes range Pretty Green - named after The Jam song of the same name - the rocker admits he doesn't want everyone wearing the collection.
He said: "I don't want just anybody wearing it. And people go, 'Oh, beggars can't be choosers.' Well I ain't a beggar, you know what I mean?"
Recently Liam announced his new band - which also features former Oasis bandmates Gem Archer, Andy Bell and Chris Sharrock - would be named Beady Eye and, work had already begun on their debut album.
The 37-year-old singer also recently joked about his dislike of his previous band's name.
He said: "Oasis was a s**t name. I'm glad to see the back of it."