Jane's Addiction frontman Perry Farrell fears the group's "awkward" reunion could be short lived if the bandmates can't bury past differences and get on with making music.

Farrell, guitarist Dave Navarro, drummer Stephen Perkins and bassist Eric Avery came together to receive a lifetime achievement award at the inaugural NME Awards USA last year, and performed at the event. That led to reunion talks, low-key shows and eventually plans to tour with Nine Inch Nails this summer.

But the singer insists the reunion is far from harmonious.

After performing with his band in a former supermarket at the South by Southwest festival in Austin, Texas last week, Farrell told Rolling Stone magazine, "It's (reunion) very awkward. I have seen Eric maybe two times in 18 years very briefly, one time we almost got into a fistfight.

"We're all getting to know each other now to see if we've all changed for the better, if we can like each other and find common ground and ways to do things that will be successful together."