Demi Lovato and Christina Aguilera's Powerful Duet—and Twinning Hair Look—Just Shut Down the Billboard Music Awards

1/50
Demi Lovato and Christina Aguilera's Powerful Duet—and Twinning Hair Look—Just Shut Down the Billboard Music Awards
When the powerhouse pair performed "Fall in Line," they proved they shine in harmony in more ways than one.
2/50
Janet Jackson
Photo: Getty Images
3/50
Taylor Swift in Versace and Casadei shoes
Photo: Getty Images
4/50
Jennifer Lopez in Roberto Cavalli and Casadei shoes
Photo: Getty Images
5/50
Christina Aguilera in Lynn Ban jewelry
Photo: Getty Images
6/50
Demi Lovato
Photo: Getty Images
7/50
Camila Cabello in Chopard jewelry
Photo: Getty Images
8/50
Kelly Clarkson in Christian Siriano
Photo: Getty Images
9/50
Dua Lipa in Alexandre Vauthier and Bvlgari jewelry
Photo: Getty Images
10/50
Hailey Baldwin in Jennifer Fisher jewelry and Jimmy Choo shoes
Photo: Getty Images
11/50
Shawn Mendes
Photo: Getty Images
12/50
Halsey in Redemption and Lorraine Schwartz jewelry
Photo: Getty Images
13/50
Nick Jonas
Photo: Getty Images
14/50
Alex Pall and Andrew Taggart of The Chainsmokers
Photo: Getty Images
15/50
Quavo
Photo: Getty Images
16/50
French Montana
Photo: Getty Images
17/50
Kygo in Musika Frère
Photo: Getty Images
18/50
Mila Kunis in David Koma and Jimmy Choo shoes
Photo: Getty Images
19/50
John Legend
Photo: Getty Images
20/50
Ciara in Julien Macdonald
Photo: Getty Images
21/50
Cheryl James and Sandra Denton of Salt-N-Pepa
Photo: Getty Images
22/50
Ashlee Simpson Ross
Photo: Getty Images
23/50
Padma Lakshmi
Photo: Getty Images
24/50
Kesha in H.Stern jewelry
Photo: Getty Images
25/50
Rhona Bennett, Terry Ellis, and Cindy Herron of En Vogue
Photo: Getty Images
26/50
Alison Brie in Jimmy Choo shoes
Photo: Getty Images
27/50
Tyra Banks
Photo: Getty Images
28/50
DJ Khaled
Photo: Getty Images
29/50
Andy Cohen
Photo: Getty Images
30/50
Chloe Kim in Self-Portrait and Sam Edelman shoes
Photo: Getty Images
31/50
Prince Jackson
Photo: Getty Images
32/50
Chrissy Metz in John Paul Ataker with a L'Afshar clutch
Photo: Getty Images
33/50
Justin Hartley
Photo: Getty Images
34/50
Bebe Rexha in Christian Siriano and Brian Atwood
Photo: Getty Images
35/50
Kyle Trewartha of Grey, Zedd, Maren Morris, and Michael Trewartha of Grey
Photo: Getty Images
36/50
Grace Vanderwaal in Hugo Boss and Chinese Laundry
Photo: Getty Images
37/50
Darren Criss in Dior Homme
Photo: Getty Images
38/50
Khalid
Photo: Getty Images
39/50
Ne-Yo
Photo: Getty Images
40/50
Jenna Dewan in Zuhair Murad with a Jimmy Choo bag
Photo: Getty Images
41/50
Normani Kordei
Photo: Getty Images
42/50
Julia Michaels
Photo: Getty Images
43/50
Luis Fonsi in Musika Frère
Photo: Getty Images
44/50
Jesse McCartney
Photo: Getty Images
45/50
Cyn
Photo: Getty Images
46/50
BTS in Gucci
Photo: Getty Images
47/50
Erika Jayne in Lynn Ban jewelry
Photo: Getty Images
48/50
Bonnie McKee
Photo: Getty Images
49/50
Justine Skye in Amen with Lynn Ban jewelry
Photo: Getty Images
50/50
Diplo
Photo: Getty Images

When the powerhouse pair performed "Fall in Line," they proved they shine in harmony in more ways than one.

Lauren Valenti

Updated Sun, May 20, 2018, 10:53 PM

Christina Aguilera and Demi Lovato were a joined force to be reckoned with at tonight’s Billboard Music Awards, taking the stage together for the first time ever to perform their uplifting new duet, "Fall in Line." And just as striking as their soaring vocals were their coordinated black PVC trench coats and glossy crops.

Each pulling off a complete 180 from their red carpet styles, Aguilera, continuing her shocking new make-under, unfurled her sleek platinum top knot and sported shiny, barely-there bends, while Lovato reworked her slicked back dark mane into center-parted wet and tousled waves. And to complement their lustrous lengths, they each sported dewy complexions to decidedly fresh effect.

Powerfully pared back with their undone texture and chin-grazing cuts, the duo proved they shine in harmony in more ways than one.

See All of the Celebrity Arrivals From the Billboard Music Awards: