Stormzy swept to victory with three gongs at the 2017 MOBO Awards - where Labour leader Jeremy Corbyn recorded a video message praising the impact of grime music.
The 24-year-old south London musician won best male, best grime act and best album for his debut release Gang Signs & Prayer.
It caps an incredible year for the rapper who scored a number one album with his acclaimed debut, performance at the Brits and a Mercury music prize nomination.
Actor and DJ Idris Elba collected the Paving The Way award for his "achievements in the arts and contribution to British culture".
Rapper Giggs was named best hip-hop act, while Craig David won the best R&B/soul prize at the ceremony which celebrates "music of black origin".
Birmingham-born rapper and singer Stefflon Don won best female.
Stormzy's girlfriend Maya Jama and former JLS star Marvin Humes hosted the event - in its 22nd year - at the Leeds First Direct Arena.
Mr Corbyn, who presented Stormzy with a GQ Award earlier this year, recorded a video message ahead of the ceremony to thank grime artists for motivating young people to vote in the last General Election.
"The MOBOs play a crucial role in the British music industry, showcasing music of black origin," he said.
"It's more important than ever that we celebrate black excellence and recognise the achievements of black communities.
"This year grime artists played a huge part in setting the agenda for British music and in the General Election, your contribution helped secure the highest youth turnout in a quarter of a century, showing the positive impact grime has on our society."
Stormzy, real name Michael Omari, was beaten in the best song category by fellow Londoner J Hus, who overcame a serious knife attack in 2015 to win the award for his track Did You See.
Stormzy's Big For Your Boots also missed out in the best video category, with Mist's Hot Property taking the gong.
Rapper Dave collected the best newcomer prize ahead of Mercury Prize-nominated Loyle Carner.
Here is a full list of the winners:
Best male - Stormzy
Best female - Stefflon Don
Best album - Stormzy, Gang Signs & Prayer
Best newcomer - Dave
Best song - J Hus, Did You See
Best video - Mist, Hot Property
Best hip hop - Giggs
Best grime act - Stormzy
Best R&B act/soul act - Craig David
Best international act - Wizkid
Best African act - Davido
Best reggae act - Damian Marley
Best jazz act - Moses Boyd
Best gospel act - Volney Morgan and New-Ye