Keith Urban's new studio album, Graffiti U, will feature some rock-star collaborations. Among the record's 15 tracks are a collaborationswith country up-and-comer Kassi Ashton on "Drop Top," as well as one with Lindsay Ell on the song "Horses."

Urban shared the special-guest news on Instagram on Thursday (April 5). Collaborations and cameos are shaping up to be a theme on Graffiti U: Urban released "Female," a song that features background vocal contributions from his wife, actress Nicole Kidman, to radio in 2017, and will also include it as the 14th track on the project.

Additionally, Urban collaborated with singer-songwriter Julia Michaels to record "Coming Home," which has been out as a single since late March. Singer-songwriter Shy Carter, who has written hits for artists like Billy Currington and Tim McGraw, joins Urban on the as-yet unreleased track "My Wave" as well.

Graffiti U is due out on April 27, but pre-orders start Friday (April 6). Earlier this year, Urban announced his Graffiti U World Tour with the help of his fans, via a video that features fans in cities across the country holding up tour stop dates written on white poster board. The tour kicks off on June 15 in St. Louis, Mo., and select dates will also feature performances from his "Horses" collaborator, Lindsay Ell. Click here to see the full list of tour dates.

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