Cuddled up to Idris Elba at the party (no, we're not jealous at all), the mesh side of Sarah-Jane's Emanuel Ungaro frock was clearly on display!
The radio and TV presenter looked beautiful (as per usual) while posing for the cameras at Ronnie Scott's Jazz Club in central London.
Sarah-Jane, who was hosting the morning's event, later tweeted: "Channelling my inner Sade. With the help of Emanuel Ungaro as my dress maker."
She also added: "It's always a good day in the office when I get to hang with the lovely Idris Elba."
Um, yes, we'd agree!
The MOBOs take place at Wembley Arena on 22 October.
Here are the MOBO nominations in full:
MOBO Best Male Act
Krept & Konan
MOBO Best Female Act
MOBO Best Newcomer
MOBO Best International Act
MOBO Best Song
Ed Sheeran ft. Pharrell, "Sing"
Fuse ODG ft. Sean Paul, "Dangerous Love"
Krept & Konan, "Don't Waste My Time"
Meridian Dan ft. Big H & JME, "German Whip"
Sam Smith, "Stay With Me"
MOBO Best Video
FKA Twigs, "Two Weeks"
Jacob Banks, "Move With You"
Rudimental ft. Becky Hill, "Powerless"
Scorcher ft. Wretch 32, Mercston & Ari, "Work Get It"
Skepta ft. JME, "That's Not Me"
MOBO Best Album
Ghetts, Rebel With A Cause
Katy B, Little Red
Krept & Konan, Young Kingz
Sam Smith, In The Lonely Hour
Tinie Tempah, Demonstration
MOBO Best Gospel Act
Living Faith Connection Choir
MOBO Best Reggae Act
MOBO Best Jazz Act
MOBO Best Hip Hop Act
Krept & Konan
MOBO Best African Act
MOBO Best Grime Act
MOBO Best R&B / Soul Act