U2’s Bono Was Starstruck When He Met Alicia Keys! (PHOTOS)

The Tribeca Grand hotel in NYC was filled with some of the music industry’s most giving hearts last night at the Keep A Child Alive documentary premiere.

Bono and Alicia Keys, both known for their selfless contributions to charity, were in attendance for the premiere, which followed a pregnant Keys and five Americans on a trip to South Africa during last year’s World Cup.

During the presentation, Alicia expressed the empathy she felt while filming the documentary, when a seemingly starstruck Bono chimed in, stating, “She’s scary, isn’t she? She’s scary.”

STORY: Alicia Keys Thinks Motherhood Is A Billion Times Better Than She Expected 

U2’s front man elaborated and stated that Alicia holds a “lioness energy.”

“I was terrified the moment I met her. I was shaking in my boots,” he said. “I was very moved by her singing of course, but what was interesting was the hard questions afterwards, and I think it’s those hard questions that she asks that lead her.”

PHOTOS: Alicia Keys & Swizz Beatz Were Power Coupled Up At “The Mountaintop” Premiere 

The compassionate pair met back in 2001 when they recorded a cover of Marvin Gaye’s “What’s Going On,” and have been an active part of the battle against AIDs since.

KACA is dedicated to providing life-saving AIDS treatment, care, nutrition, support services and love to children and families affected by HIV/AIDS in Africa and India.

The Keep A Child Alive documentary will air on Showtime December 1st to kick off World AIDs Day.