The organisation has teamed up with P&G for the special, which will raise funds for LGTBQ+ communities most impacted by the coronavirus crisis, after pride events worldwide were cancelled due to the pandemic.
Big Freedia, Melissa Etheridge, Katy Perry, Kim Petra, and Sia among others are also set to perform during the celebration, which will culminate with a one-hour special hosted by iHeartMedia personality Elvis Duran and actress and LGBTQ+ advocate Laverne Cox.
"Honored to continue commemorating Pride month with @iHeartRadio's 'Can't Cancel Pride: Helping LGBTQ+ People in Need' this June 25th," Adam shared.
"Very proud to be able to lift up my LGBTQ+ brothers and sisters this Pride month with @iHeartRadio's Can't Cancel Pride: Helping LGBTQ+ People in Need," Katy tweeted. "Be sure to save the date, June 25th."