MTV.com News — Jonas Brothers, American Idols Live! outings have also seen slow sales.By Gil Kaufman Rihanna Photo: Fotonoticias/ WireImage By now you've heard about the slump the concert industry is in this summer. Major tours are struggling and cancelin... more info

VH1 News — Rihanna canceled shows in two cities amid a concert-industry slump; the Jonas Brothers and American Idols Live! have also seen slow sales. more info

Perez Hilton — This is a disaster!!! They might as well just cancel the whole tour! Yet another one of Rihanna's stops on her Last Girl On Earth Tour has been cancelled, bringing the grand total of axed performances to 6!!! Now, her promoters announced that her Atl... more info

Starpulse — Rihanna has been forced to scrap another date on her U.S. tour due to poor ticket sales. The Umbrella hit-maker axed the launch show of her Last Girl On Earth Tour with Ke$ha last week. Her tour ... more info

Pop Crunch — Rihanna has been forced to scrap another date on her Last Girl on Earth North American Tour, reportedly due to poor ticket sales.The Umbrella hitmaker axed the launch show of her Last Girl On Earth Tour with Ke$ha last week. Tour promoters blamed cha... more info

Guardian Music — Could the announcement that the world's biggest promoters, Live Nation and Ticketmaster, are about to reduce the cost of tickets bring live music sales out of a slump?Looking at the success of this year's 40th anniversary of Glastonbury, one could ea... more info

ContactMusic — RIHANNA has been forced to scrap another date on her U.S. tour due to poor ticket sales.The Umbrella hitmaker axed the launch show of her Last Girl On Earth Tour with... more info

411 Mania — Last Girl on Earth tour still struggling... more info

Jam! Showbiz Music, Canada — Rihanna has been forced to scrap another date on her U.S. tour due to poor ticket sales. more info

Perez Hilton — What's going on here??? Explain Miz Rihanna! This morning, ticket holders to RiRi's Denver show received an email saying that their show next Thursday was CANCELLED! No explanation was given, but the promoters promised to return everyone's money. Th... more info