Rita Ora dared to bare nearly all in a see-through dress at the Vanity Fair Oscars after-party. The singer's tattoos could be seen through the sheer black mesh gown and she appeared not to be wearing any underwear.

Not to be outdone, Russian model Irina Shayk also wore a daring black mesh outfit that left little to the imagination.

At the other end of the scale, Australian singer/songwriter Sia covered up, obscuring her face with a platinum blonde wig. At least we think it was her.

Oscars 2015 Vanity Fair party Rita Ora
Rita Ora arrives at the 2015 Vanity Fair Oscar Party in Beverly HillsDanny Molshok/Reuters
Oscars 2015 Vanity Fair party
Irina ShaykReuters/Getty Images
Oscars 2015 Vanity Fair party
Sia attends the 2015 Vanity Fair Oscar PartyPascal Le Segretain/Getty Images

The Vanity Fair party is one of Hollywood's most glamorous events, attended by Oscar winners, nominees and film royalty.

Fashionistas will no doubt be poring over the outfits worn by the celebrities in an effort to identify trends.

Oscars 2015 Vanity Fair party
Lady GagaDanny Molshok/Reuters
Oscars 2015 Vanity Fair party
Beyonce, Naomi Watts and Natalie PortmanReuters/Getty Images
Oscars 2015 Vanity Fair party
Amy Adams, Kylie Minogue and Sofia VergaraDanny Molshok/Reuters
Oscars 2015 Vanity Fair party
Reese Witherspoon, Margot Robbie and Zoe SaldanaReuters/Getty Images
Oscars 2015 Vanity Fair party
Lupita Nyong'o, Jessica Chastain and Jennifer AnistonPascal Le Segretain/Getty Images
Oscars 2015 Vanity Fair party
Rashida Jones, Hailee Steinfeld and Minnie DriverPascal Le Segretain/Getty Images
Oscars 2015 Vanity Fair party
Jennifer LopezDanny Molshok/Reuters
Oscars 2015 Vanity Fair party
Jared Leto photobombs producer James W Skotchdopole as he poses with his best picture award for BirdmanDanny Molshok/Reuters
Oscars 2015 Vanity Fair party
Patton Oswalt photobombs "Captain Kirk" Chris Pine at the 2015 Vanity Fair Oscar PartyDanny Molshok/Reuters
Oscars 2015 Vanity Fair party
Sam and Aaron Taylor-Johnson, Eddie Redmayne and Hannah Bagshawe, and Channing Tatum and Jenna Dewan TatumPascal Le Segretain/Getty Images
Oscars 2015 Vanity Fair party
Julianne Moore arrives at the 2015 Vanity Fair Oscar Party with her best actress award for her role in the film Still AliceDanny Molshok/Reuters