Lady Gaga and Bruno Mars have released a surprise duet titled 'Die With a Smile,' marking their first collaboration and Gaga's first new single in two years. The song, featuring a retro Western aesthetic, debuted with an accompanying music video and was performed live at Mars' sold-out Los Angeles show. Fans have praised the collaboration, calling it a 'timeless classic' and expressing hope for a full album from the duo. The single has been teased on social media, with both artists sharing promotional photos and hints leading up to the release. This collaboration comes as both artists are working on new solo projects, with Gaga preparing for her upcoming album 'LG7' and Mars continuing his residency in Las Vegas.