In Pics: Here are the key winners of Grammys 2018

Alessia Cara won Best New Artist award. Reuters

Bruno Mars sweeped the major categories with his '24K Magic' album. Reuters

Country singer Chris Stapleton won three Grammys. Reuters

Donald Glover/Childish Gambino won Best Traditional R&B Performance. AFP

Kendrick Lamar won three awards in Rap categories. Reuters

(L-R, rear) Zoe Manville, John Gourley, Jason Wade Sechrist, and Zachary Scott Carothers, (L-R, front) Kyle OQuin, and Eric Howk of musical group Portugal. The Man, winners of the Best Pop Duo/Group Performance award for Feel It Still. AFP

Rihanna and Kendrick Lamar collaborated for his song 'Loyalty.' The duo won the trophy for Best Rap Performance.