The 22-year-old star performed her new single Somebody To Love at the ceremony at the O2 Arena on February 15.
Ticket exchange website viagogo has seen demand for tickets to see the star surge since the performance with a 180% rise in online searches for tickets.
Adele will play a London show in April and tickets for that show are now trading at £170 on the site, which is £80 more than before her performance.
Viagogo UK's director Ed Parkinson said: 'Adele proved the power of a live performance, as despite not winning an award, tickets to see Adele are proving to be the hottest post Brit ticket - outstripping all other acts that performed live at the Brits.'