​Jimmy Fallon performs Iggy Azalea’s “Fancy” with Crosby, Stills and Nash

The king of viral videos has struck again – and this time, it's Canadian!

Late-night talk show host Jimmy Fallonperformed Iggy Azalea’s “Fancy” with David Crosby, Stephen Stills and Graham Nash on The Tonight Show, with Neil Young's longtime bandmates performing occasional verse call-outs like “let’s get drunk on the minibar” and Jimmy doing a spot-on impression of the Canadian rocker.

Iggy has had a super-hit on her hands with “Fancy,” which is resting comfortably at number one on the Billboard’s Hot 100 chart for its seventh straight week.

Seven weeks is a record for a female rapper at number one – Lil’ Kim’s “Lady Marmalade” took the top spot for five weeks in 2001, while Lauryn Hill’s “Doo Wop (That Thing)” reigned for two in 1998.

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Currently, Iggy boasts the top two spots on Billboard’s Songs of the Summer chart as well, with “Fancy” holding court and Ariana Grande’s “Problem (feat. Iggy Azalea)” right behind it.

More: 10 fun facts about Ariana Grande

Iggy, 24, and Ariana, 21, recently made UK history by being named the first number one based on sales and audio streams combined.

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