See KNOCKED LOOSE's Bryan Garris scream with 30 SECONDS TO MARS at Lollapalooza | Revolver

See KNOCKED LOOSE's Bryan Garris scream with 30 SECONDS TO MARS at Lollapalooza

Garris lent his vocals to "The Kill"

We didn't see this one coming: Over the weekend, Knocked Loose vocalist Bryan Garris made a surprise appearance with 30 Seconds to Mars, performing "The Kill" with the Jared Leto-led group at Lollapalooza.

Both acts were booked at the 2023 festival. After Knocked Loose received a volcanic reaction from the Lolla crowd, Garris lent his unique vocals to 30 Seconds to Mars' biggest song. The hardcore frontman appeared onstage next to Leto near the end of "The Kill," sending the Internet into a stir following the unlikely collab.

"I sang the kill with 30 seconds to mars today," Garris tweeted after posting, "Important weekend. This year we have invaded a lot of the mainstream pop festivals. Starting with @coachella , then @Bonnaroo , and now @lollapalooza . We don't fit in, we don't belong, we don't care. Every set has been amazing, every scene has been welcoming."

Watch the footage from Lollapalooza 2023 above.