Lady Gaga at Roseland Ballroom

Lady Gaga performs on stage at Roseland Ballroom on March 28, 2014 in New York City.

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Lady Gaga is ramping up publicity ahead of her ARTPOP world tour.

On the heels of her "Late Show" gig, the singer will guest host the syndicated radio countdown show "American Top 40 With Ryan Seacrest" on April 5 and 6.

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Gaga will take calls and questions from fans and discuss her third single, "G.U.Y." off ARTPOP, as well as offer a glimpse into the making of the music video, which features cast members from Bravo's Real Housewives franchise.

The news comes as Gaga is currently in the middle of a sold-out, seven-night residency, which wraps April 7, at the shuttering, historic New York City venue Roseland Ballroom. She also invited the "Late Show" studio audience to the fourth of her seven Roseland shows, and took part in a selfie with frequent Late Show guest Bill Murray and host David Letterman.

Additionally, Gaga is taking over Viacom-owned networks MTV, MTV Hits and Logo with a behind-the-scenes look at the making of her tour on April 4.

Gaga kicks off her artRAVE: The ARTPOP Ball Tour on May 4 in Ft. Lauderdale.

American Top 40 is the top countdown show in the U.S., syndicated by Premiere Networks on nearly 500 radio stations worldwide.

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