The diamonds aren't shining quite so bright right now for Rihanna, as the Pop star was forced to cancel tonight's Boston show as part of her Diamonds tour because of an illness. Live Nation announced this morning, "Unfortunately, following her sold out concert on Friday Rihanna has contracted laryngitis and per doctor's instruction is unable to perform this evening." The Boston show is expected to be rescheduled; the next tour performance will be held Tuesday in Baltimore. Rihanna will be visiting over 25 cities on her Diamonds tour.

It looks like Prince is the latest big name added to SXSW in Austin, as HitFix reports the Purple One will perform at La Zona Rosa on Saturday night. HitFix also suggests Prince will be making an appearance at "a certain awards show held during music festivities in Austin this week," which could mean mtvU's Woodie Awards on Thursday night.

Stone Sour

Justin Bieber seems to be having a rough month of March. Between Bieber and his entourage being kicked out of a club in London on his 19th birthday, showing up an hour late for a show which instigated many boos and complaints, collapsing in the middle of a concert, and a verbal altercation with a British paparazzo, he now finds himself canceling one of two shows in Portugal. The show's promoter, Everything is New, stated Sunday "Due to unforeseen circumstances, Justin Bieber was forced to cancel the second operation, in Portugal, on 12 March." The full details are unknown, and Bieber has mentioned nothing of it on his Twitter, though the singer tweeted, "Lisbon, Portugal today. #BELIEVEtour #SOLDOUT."

Alabama Shakes will kick off a North American headline tour on June 18 in Columbus, OH. Tickets go on sale to the public on Friday and Saturday, March 15 and 16. Meanwhile, the band wraps up its spring headline tour this Saturday, March 16, and will head to Latin America later this month for a series of shows, including performances at Lollapalooza in Brazil and Chile. Alabama Shakes will also play numerous summer festivals, including Firefly in Dover, DE, London's Hard Rock Calling and the Calgary Folk Music Festival.

Depeche Mode has announced the North American leg of their 2013 Delta Machine tour. The new dates begin August 22 in Detroit and run up to October 8 in Phoenix. Their new album, Delta Machine, is out March 26 and the band will perform a Live On Letterman webcast tonight on CBS.com and VEVO.

Device, the new side project of Disturbed's David Draiman, has announced a spring tour, starting in Mobile, AL on April 10. Dates have been announced up to May 4 at Carolina Rebellion in North Carolina, with a handful of radio festival dates along the way. The self-titled Device album is due out April 9.

Lupe Fiasco is investing his time and talent as the creative director for a new health and wellness app called Higi. "The dope part about this, other than just being creative director, is adding value to this company because it adds value to the world," the rapper told Billboard.com. Meanwhile, he is still working on his next record, Tetsuo & Youth, which is due later this year.

Get ready for some new club tunes from singer/actress Selena Gomez, who ecently revealed some information about her upcoming album, saying that a new single will be out by April followed by a tour this summer. The album's title and release date are currently unreleased, though she said she's hoping for a release date in March. Gomez stated that she drew inspiration from Skrillex and a little from Taylor Swift. The end result, she told Teen Vogue, is "a little Ellie Goulding-ish, a little island-y feel," she added, "It's a really fun pop record. I'm super stoked for it. It's kind of been hush-hush about it, and I'm excited for the single to come out and for my fans to hear it."

Phoenix will return to Saturday Night Live as the musical guest on April 6. Melissa McCarthy will host for her second time. The new Phoenix album Bankrupt! is due out April 23.

The Smashing Pumpkins have announced a new round of 2013 worldwide tour dates. The North American leg begins April 29 in Melbourne, FL, and runs up to the Pumpkins' set at Rock On The Range in Columbus, OH on May 18. The band will then tour Europe in June and July, with a pair of Japanese appearances at Summer Sonic in August.

O.A.R. has announced their 29-date Sounds of Summer Tour, which will run from June 7 in Norfolk, VA to August 3 in Holmdel, NJ. Joining the band on the road this summer will be special guests Andrew McMahon and Allen Stone. O.A.R. is currently at work on their eighth studio album.

Soulful singer Jill Scott is set to co-star opposite Jason Lee in Second Sight, a CBS drama pilot about the lead detective with the New Orleans Police Department who is hiding the fact that he has an ocular disorder that causes him to have hallucinations. Scott will play eye doctor Dr. Callier, according to Deadline.com.

Due to a kidney stone attack, Mötley Crüe singer Vince Neil had to stop in the middle of a performance in Sydney, Australia on March 10. The rockers were playing in Allphones Arena when Neil was taken directly from the stage to a nearby hospital. Guitarist Mick Mars apologized on Twitter, saying, "Sydney, my apologies for a short set this evening. Vince had an attack of kidney stones. He went straight from stage to the hospital." The band is set to continue their tour through Australia, co-headlining with KISS, on Tuesday night in Brisbane. Band manager Allen Kovac told CNN, "In nearly 20 years of managing Motley Crue, I can't recall a show the band has canceled."