Apple has announced iTunes Live: London Sessions, an 11-day musical event that will run from February 21 through March 2 and will feature more than 25 live performances from artists such as José González, KT Tunstall, Nick Cave & The Bad Seeds, and Ron Sexsmith. Tickets to the performances are available separately by date, and will be dispersed solely through an online competition, which requires applicants to be iTunes Store account holders.…