And Katy Perry and Zedd were looking perfectly matched in black and white, as they jointly presented the first award of the night at the iHeart Music Awards 2019 on Thursday.
Katy, 34, was cute as ever in a 1950s-influenced monochrome A-Line gingham Paskal dress.
The retro-loving star put a shiny spin on vintage vibes, which showcased her slender waist.
Her collared frock was unʙuттoned just enough to reveal a blue bra beneath while highlighting her hourglᴀss figure with a thick belt in the center.
She added a pair of patent leather Majesty gloves and black Katy Perry collection Mary Janes with white socks.
Continuing her retro styling, she wore her hair in a platinum bob curled under à la 50s housewife and swept out of her face with a shiny headband.
Cherry red lips and vintage round earrings from the Katy Perry collection, neatly complemented her striking outfit.
Her date for the evening was not fiance Orlando Bloom, but rather DJ/collaborator Zedd.
The 29-year-old Russian-born hunk stood alongside Katy, and wore a silver and black pattern suit.
Together, they presented the award for Best Duo/Group of the Year to 5 SOS.
The sixth annual iHeartRadio Awards are being held the Microsoft Theater in Downtown Los Angeles on Thursday night.
It is shaping up to be a huge night as Taylor Swift is expected to be making an appearance as she was already named winner of the Tour of the Year Award for her Reputation Stadium Tour.
Ariana Grande will also be performing and is nominated for five awards.
Coming off of her incredible job in hosting The Grammys last month, Alicia Keys will not only be performing at the event but also be recognized for her trailblazing in the music industry.
The 38-year-old will be receiving the iHeartRadio Innovator Award for her contributions to pop culture and social causes as an artist, songwriter, producer, entrepreneur, and activist.
She joins esteemed company including Bruno Mars, Pharrell Williams, U2, Justin Timberlake, and Chance the Rapper.
Garth Brooks will also be honored as the first ever recipient of the Artist of the Decade Award.
The 57-year-old musician is the number-one selling solo artist in US history and is also set to hit the stage for a performance.
Halsey will also hit the stage as she will also be receiving the Fangirls Award presented by L’Oreal Paris which recognizes a female artist who has pushed boundaries with her music and message while inspiring her fans.
Camila Cabello was the inaugural winner of the award last year.
Other performers include Kacey Musgraves, Backstreet Boys, Maren Morris, John Legend, Ella Mai, Marshmello and Travis Barker.
Many top stars will also be presenting including the likes of Katy Perry, Nicole Scherzinger, Robin Thicke, Bebe Rexha, Shay Mitchell, Pharrell Williams, Zedd, Jamie Foxx and his daughter Corinne.
Masked Singer winner T-Pain is hosting the event.