Lorde's Younger Sister Makes Singing Debut

01/22/2014 at 10:00 AM EST

India Yelich-O'Connor Makes Music Debut: Lorde Sister
From left: India Yelich-O'Connor and Lorde
Courtesy India Yelich Oconnor; Mike Lawrie/WireImage
For every Kate Middleton, there's a Pippa.

Likewise, "Royals" singer Lorde, 17, isn't the only one ruling the mic in her family. Her sister India Yelich-O'Connor, 15, has released a debut track on SoundCloud (and baby, she'll rule, she'll rule, she'll rule, she'll rule – you get it).

The song, a cover of A Great Big World's "Say Something," has already earned more than 150,000 plays (and counting!) since it was posted Jan. 18. (Listen below.)

She "merely put this cover up as something for a little bit of fun," India told Australia's Fairfax Media.

The four-time Grammy nominee's little sister quietly Tweeted out the song (on what appears to be her personal Twitter account) without further elaboration.

Like the decidedly profound Lorde, a breakout artist in her own right, India also blogs. No surprise here: In addition to musical talent, the sisters clearly share their command of the written word. (See for yourself.)

And she's already got friends in high places – in addition to her famous sibling.

Here's our suggestion for her next cover:

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