The move means that users of the new operating system will be able to purchase MP3s directly from the BlackBerry App World.
More than 22 million tracks will be available via a dedicated section of the storefront, covering everything from chart-topping acts to local artists.
The music platform will be deeply integrated within the operating system, paving the way for social features such as sharing and recommendations.
7digital, which launched its Windows 8-compatible online store over the summer, has collaborated with RIM in the past, providing music services for BlackBerry Phones and the PlayBook tablet.
The first BlackBerry 10 devices are expected to be released during the first quarter of next year.