Liam Gallagher has made a surprise appearance at the Lollapalooza Festival. He joined The Killers onstage Sunday night.

The Killers was singing "All These Things That I've Done" toward the end of the show when Gallagher suddenly joined them onstage. Brandon Flowers, the lead vocalist of The Killers, was surprised to see Gallagher there.

Flowers was singing with so much emotion when Gallagher suddenly touched his back. The singer got scared for a few seconds, but he immediately realized that it was just the frontman of Oasis.

After singing "All These Things That I've Done," The Killers paid tribute to Gallagher's band and sung Oasis' hit song "Gas Panic." The track is featured in the group's 2000 album Standing on the Shoulders of Giants.

The Killers Covers 'Wonderwall'

This is not the first time that The Killers covered an Oasis song. Last week, the group sang "Wonderwall" at the Lollapalooza in Chile. Prior to the group's performance, Flowers gave Gallagher a shout out and called him a king.

"We heard you missed out on a couple of songs today that you wanted to hear. Any night that 'Wonderwall' is being sung by other people is a good thing," said Flowers.

Liam Gallagher Career

Gallagher is an English singer and songwriter, who rose to fame as the lead performer of the rock band Oasis. He also served as a singer for Beady Eye.

The 45-year-old musician was the one that wrote "Song Bird" and "I'm Outta Time" for Oasis, but his brother was the one that wrote the majority of the tracks for the band.

After Oasis and Beady Eye disbanded, Gallagher pursued his solo career. Last year, he dropped his debut album As You Were. Some of his songs are "Wall of Glass," "For What It's Worth," "Greedy Soul," "Paper Crown," "Come Back to Me," "Universal Gleam," "Chinatown," "I Get By," "I Better Run," and more.

He suffered a chest infection this month so he was unable to perform at the Lollapalooza in Chile.

About The Killers

The Killers is an American rock band formed in Las Vegas, Nevada in 2001 by Flowers and Dave Keuning. In 2002, Mark Stoermer and Ronnie Vannucci Jr. joined the band.

Some of the band's chart-topping studio albums are Hot Fuss, Sam's Town, Day & Age, Battle Born, and Wonderful Wonderful. Some of the group's songs are "Mr. Brightside," "Somebody Told Me," "Human," "Ready My Mind," "Spaceman," "Just Another Girl," and more.