Over the past few months, musicians have been canceling tours or shows for lots of reasons: The singer gets sick, tickets just aren't selling, the drummer breaks both his feet, there are "production issues," the guitarist gets tackled by a crazed fan and ends up with busted ribs, or they simply aren't allowed into the country.

Then there was the cryptic message Scars on Broadway posted on their Web site on Monday, which announced that the group's North American tour — slated to begin on October 19 — has been canceled because singer/guitarist Daron Malakian's "heart wasn't into touring at this time." The band, which also features Malakian's System of a Down bandmate John Dolmayan on drums, said they will not be rescheduling the tour and are also canceling an October 14 appearance on "Jimmy Kimmel Live."

So, what gives? Malakian updated fans this morning, telling them, "I've read many of your postings, and I owe it to all of you to respond: I understand all of your frustration and anger, and I never meant to let any of you down. Your support for Scars has been so important to me and the band. I would never cancel a tour unless I had real reasons and personal things that require my undivided attention. The music of Scars will live on, but now is a time when aspects of my life need to be tended to. I hope all of you can understand."

A representative for the group could not be reached for comment at press time.

· Weezer frontman Rivers Cuomo took to their Web site this week to update on fans on the progress they're making on their next LP. "We have one song left to mix and then it's on to mastering," Cuomo wrote. "We should be all done very soon. Then we chill for a minute. The album will be out in June, so with any luck you will hear a new Weezer song on the radio soon. I think I know which song is the first single, but I'm not sure so I can't tell you. I'll give you some hints, though. It's one word, starts with a T, ends with an R and contains 12 letters. The album is meaty, crunchy and melodic like a good Weezer album should be."

· Muse are thinking about going the Radiohead/ Nine Inch Nails route for their next record. According to NME, the band, which is currently working on its next album, might only release new material as singles from now on. Frontman Matt Bellamy told the magazine, "I like the idea of releasing a series of songs, every month or every couple of months — just putting songs out there. Almost like making the single a more prominent format, and then every few years doing a best-of from that period and that would be the album. So, in other words, throw out songs every couple of months and see how people like them."

· Hatebreed frontman Jamey Jasta is working on his first solo LP. "I am in such a great space creatively these days," he said in a press release. "I have been writing profusely on my solo material. I don't have a release date in mind for this project, but my studio work is certainly sharpening my vocal and writing skills for the next Hatebreed studio album which is going to be completely next level."

· Could Coachella bring about a System of a Down reunion? It's possible, seeing as frontman Serj Tankian has been added to the festival's lineup, which also includes Scars on Broadway, the band featuring System guitarist Daron Malakian and drummer John Dolmayan. System of a Down have been on hiatus since the fall of 2006.