Don't expect Spotify to launch in the U.S. anytime soon. Although founder and chief executive Daniel Ek had previously announced it would be available in the states in time for the holidays, he backpedaled Tuesday in a Q&A at the D:Dive Into Mobile confernence and said that he can't commit to a launch date.

Started in 2009, Spotify is a streaming music service that is currently only available in Europe. Users have access to up to 20 hours of unlimited music through a free, ad-supported version and a subscription-based model. Features include the ability to: search, browse, and play millions of tracks; stream over Wi-Fi or 2.5/3G; access offline playlists; on-the-fly sync; a what's new tab; wireless sync of your local files to your phone; and the ability to tag favorites into a special list.

But part of the reason for the delayed U.S. launch is that Spotify has yet to set up deals with the major labels. According to Billboard, Spotify has pretty much reached a deal with Sony, but it isn't anywhere near an agreement with Universal Music Group and Warner Music Group.

Ek said the problem with Spotify in the states is two-fold. "It's a business problem and a product problem at the same time," he said.

Although Ek admitted that he couldn't commit to a date, he did say that Spotify is "definitely going to do the U.S."

Spotify has 750,000 users in Europe who pay 10 euros per month. According to Ek, subscription in the U.S. will have a $10 monthly fee attached.