Bon Jovi, circa 1986

Online music community iLike owes a lot to Facebook's decision to open its back-end to developers last month. The change has advanced iLike from 3 million users in May to a current total of 1 million new Facebookers per week, reports Reuters.

The music-sharing site allows Facebook users to share music preferences and receive concert and music suggestions from other users. It also includes an iTunes widget that creates automatic playlists based on one's iTunes library.

The music industry is jumping on board iLike's success, with record labels creating iLike profiles that provide streaming music and tour dates for the Facebook audience.

Bon Jovi is taking it one step further by sending targeted emails with a presale ticket offer to iLike users that live near New Jersey's Prudential Center and list the band as preferred artist.

iLike generates revenue by taking a cut of album and ticket sales. Its services are free to users. Ticketmaster has a 25 percent stake in the company.