The 40-year-old is known for concealing her face at public events, during performances and in her music videos Matching: As she made her usual statement, Sia dressed in an all-black outfit which included an over-sized low-cut coat and matching flared slacks The singer told Ellen her tune Bird Set Free was originally written for box office film Pitch Perfect 2

SIZE XXS *BODY: Bust: fits bust around 32-33/ 82-84 cm Waist: fits waist around 24-25/ 62-64 cm Hips: fits hips around 33-34/ 84-86 cm *GARMENT: Bust: +/- 16.5/ 42 cm Waist: +/- 16.1/ 41 cm Front length: +/- 44.8/ 114 cm Sleeve length: +/- 5.9/ 15 cm SIZE XS *BODY: Bust: fits bust around 33-34/ 84-88 cm Waist: fits waist around 25-26/ 64-68 cm Hips: fits hips around 33-35/ 86-90 cm *GARMENT: Bust: +/- 17.3/ 44 cm Waist: +/- 16.9/ 43 cm Front length: +/- 45.2/ 115 cm Sleeve length: +/- 6.1/ 15,5 cm SIZE S *BODY: Bust: fits bust around 34-36/ 88-92 cm Waist: fits waist around 26-28/ 68-72 cm Hips: fits hips around 35-37/ 90-94 cm *GARMENT: Bust: +/- 18.5/ 47 cm Waist: +/- 18.1/ 46 cm Front length: +/- 45.6/ 116 cm Sleeve length: +/- 6.3/ 16 cm SIZE M *BODY: Bust: fits bust around 36-38/ 92-96 cm Waist: fits waist around 28-30/ 72-76 cm Hips: fits hips around 37-38/ 94-98 cm *GARMENT: Bust: +/- 19.6/ 50 cm Waist: +/- 19.2/ 49 cm Front length: +/- 46/ 117 cm Sleeve length: +/- 6.5/ 16.5 cm SIZE L *BODY: Bust: fits bust around 38-39/ 96-100 cm Waist: fits waist around 30-31/76-80 cm Hips: fits hips around 38-40/ 98-102 cm *GARMENT: Bust: +/- 20.8/ 53 cm Waist: +/- 20.4/ 52 cm Front length: +/- 46.4/ 118 cm Sleeve length: +/- 6.6/ 17 cm SIZE XL *BODY Bust: fits bust around 39-42/ 100-108 cm Waist: fits waist around 31-35 / 80-90 cm Hips: fits hips around 40-43 / 102-110 cm *GARMENT: Bust: +/- 22/ 56 cm Waist: +/- 21.6/ 55 cm Front length: +/- 46.8/ 119 cm Sleeve length: +/- 6.8/ 17,5 cm SIZE XXL *BODY: Bust: fits bust around 42-45/ 108-116 cm Waist: fits waist around 35-37/ 90-94 cm Hips: fits hips around 43-46/ 110-118 cm *GARMENT: Bust: +/- 23.2/ 59 cm Waist: +/- 22.8/ 58 cm Front length: +/- 47.2/ 120 cm Sleeve length: +/- 7/ 18 cm *Please note, those garment measurements refer to the garment itself and are taken flat, so youll need to double them when necessary

Designed with short sleeves for comfort and easy movement, this dress pairs perfectly with jewelry earrings or other traditional accessories
Finished with simple pullover styling, its the kind of throw-on-and-go dress youll reach for all season
Shop the Outfit: Like Mary Jane trainers, these studded strappy flats are a footwear hybrid fashion-people can't stop wearing