justin timberlake

Supporters a Pakistani religious party rally to condemn a Supreme Court decision that acquitted Asia Bibi, a Christian woman, who spent eight years on death row accused of blasphemy, in Karachi, Pakistan, Friday, Nov. 2. The release of Bibi was apparently delayed Friday after talks failed between the government and radical Islamists who want her publicly hanged. Placards read: 'release of blasphemous Asia is unacceptable.' (AP Photo/Shakil Adil)

The music industry has rippled with a wave of surprise announcements in recent weeks: Justin Timberlake is making new music after more than half a decade; girl group Destiny's Child and rap duo Kris Kross are both reuniting; and boy bands 98 Degrees, Boyz II Men and New Kids on the Block are going on tour together. This string of seemingly random events has started 2013 as an especially intriguing year in music that begs the question — are comebacks on the rise?