Getty Images /Kevin Winter

Lorde Hits The 'Tennis Court' In All-Black Everything At Billboard Awards

She also wore a huge Zorro hat.

Lorde has been taking some well-earned time off from performing lately due to some health issues, but the New Zealand superstar was back in a big way on Sunday night (May 18) at the Billboard Music Awards for the prime time debut of her new single, "Tennis Court."

Shedding the fuzzy goth Muppet outfit she came in, the 17 (and a half)-year-old singer switched into yet another all-black-everything ensemble, complete with a giant Zorro hat, for one her patented intense, jittery performances under a forest of disco balls.

With two awards already in hand for the night (Top New Artist, Top Rock Song for "Royals"), Lorde felt free to bust out some of her signature "whut-whut?" arm motions and bring frosty, cool kid vibe to an otherwise poptastic night of over-the-top performances from the likes of a holograhic Michael Jackson, Ariana Grande and 5 Seconds of Summer.