Apple plans to make an iTunes-related announcement on Tuesday.
The California gadget-maker said there would be "an exciting announcement from iTunes" at 7:00 am Pacific time (1500 GMT) on Tuesday but declined to reveal any further details.
"Tomorrow is just another day. That you'll never forget," said an Apple teaser for the announcement on the home page of Apple.com.
Apple launched the latest version of its online entertainment store, iTunes 10, in September along with a music-centered social network, Ping.
According to Apple, more than one million users joined Ping in the 48 hours following its launch.
Ping, available as a free download at itunes.com, allows users to view photos and videos of their favorite musicians and receive information about concert dates.
Ping users can also connect with friends online to discuss albums and songs and make musical recommendations.