"Kimbra's collaboration brings her music, voice and her personality to the attention of music fans in the US and worldwide, which is what every artist strives for,'' Recording Industry Association of New Zealand chart manager Phil Matcham said.
People would now know the singer/songwriter's name and what she was capable of musically, he said.
And with the release of her first album Vows just around the corner, her latest achievement gave Kimbra the perfect platform to achieve further international success in her own right, Mr Matcham said.
Reaching No 1 on the Billboard Hot 100 list - a chart based on sales, airplay and digital downloads - makes Kimbra the first New Zealand woman to ever hit the top spot, Mr Matcham said.
"It's fantastic to see a Kiwi artist reach the top spot - it's a great track and we're thrilled to see Kimbra achieve such amazing success on the world stage,'' he said.
The only other New Zealand song to reach No 1 in the US was OMC's How Bizarre, which topped the Billboard Pop Chart in 1997.
The Flight of the Conchords reached the No 3 spot on the Billboard Albums Chart in 2008, while Crowded House's single Don't Dream It's Over made it to No 2 on the US Billboard top 100 in 1987.
Gotye, whose real name is Wouter De Backer, was born in Belgium but moved to Australia at the age of 2.
Somebody That I Used to Know is taken from Gotye's third album, Making Mirrors, and after writing the song he teamed up with Kimbra to record it.
Kimbra grew up in Hamilton but moved to Melbourne in Australia after finishing school.