KISS A PICKETER: Lorde has asked her fans to plant a kiss on Christian extremist protesters outside of her upcoming show in Kansas.

Lorde has asked fans to wear "rainbow clothing" to her upcoming show in Kansas after extremist Westboro Baptist Church (WBC) published plans to protest the concert.

The American church, known for its radical ideologies, especially against homosexuality, plans to picket the show at Midland Theatre on March 21.

WBC says it wants "to warn the living", because the 17-year old New Zealander, real name Ella Yelich-O'Connor, "doesn't have enough sense to put in a thimble".

The church's poster says Lorde carries an "idolatrous attraction for worthless human royalty".

"[Lorde] spends her time, energy and talent serving herself and teaching other young people how to be indolent rebels," it says.

WBC appears to have misinterpreted her music, which attacks materialism, fame, and wealth. WBC also published on its website a parody of Lorde's chart-topping single, Royals.

Last month the church used the instrumental track from Katy Perry's hit single Roar to tell the story of a coming apocalypse.

Lorde, the Double Grammy winner from Auckland, posted a series of tweets encouraging fans to wear bright clothing and "kiss church members who are the same sex as you".

everyone try to kiss church members who are same sex as you they will so love it christmas comin early in kansas city~🎄🎄🎄 — Lorde (@lordemusic) March 18, 2014

everyone wear rainbow clothing to that show — Lorde (@lordemusic) March 18, 2014

Her sold-out North American tour has been praised by critics.

Listen to the church's parody of Royals below.