On Monday, Beyoncé's dad, Mathew Knowles, opened up the vault and gave fans access to previously-unreleased music. The songs, which were recorded with the "Diva" singer's former group, Girls Tyme, hit various streaming services to the delight of the Beyhive.

Mathew had been teasing the 15-track album, which is titled "Destiny's Child: The Untold Story Presents Girls Tyme," for a couple of weeks prior to the release. On Nov. 21, he shared posts to his various social media accounts revealing that the new music was on the horizon.

The Houston-based ensemble would go on to compete on "Star Search," which was referenced in Beyoncé's 2014 music video for her song "Flawless."

Eventually, the group settled on the trio that Destiny's Child fans came to know over the years -- Beyoncé, Kelly Rowland, and Michelle Williams. Previously, Mathew served as manager for Girls Tyme, Destiny's Child, and Beyoncé before parting ways with the role in 2011.

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The new collection of songs features titles such as "Sunshine" and "632-5792," which are slower songs, paired with several that are more uptempo, such as "Boyfriend" and "I Wanna Be Where You Are." The 15 songs are also accompanied by a new book, "Destiny Child's: The Untold Story," which is now available.

As for what is inside the book, Mathew shared a first look with TMZ on Tuesday. "We're talking about 1992, all the way to 2007. We're talking about five different names of the group, from Girls Tyme to Destiny. And, then we're also talking, believe it or not, there was over 30 members from Destiny's Child to Girls Tyme," he revealed.

In addition to the newly-released material, rumors circulated earlier this year that the three members were considering a reunion after seeing the success of the Spice Girls' 2019 tour, but at this time, there has not been an official announcement.

"Destiny's Child: The Untold Story Presents Girls Tyme" is currently streaming on Spotify.

Beyoncé Knowles
Beyoncé is pictured onstage during Coachella Valley Music And Arts Festival Weekend 1 in Indio, California, on April 14, 2018. Kevin Winter/Getty Images