Johnson Wen was sentenced to nine days in jail in a Singapore court on Monday.
Grande called her win "wild and beautiful" and thanked her fans for "being my main source of joy and inspiration always."
The Coachella Valley Music and Arts Festival released its 2019 lineup on Wednesday.
A Grande source told People magazine that their relationship "was way too much too soon" and that the breakup is "not shocking to anyone."
Jennifer Lopez's 10-minute powerhouse performance was among the most memorable moments during Monday night's award show.
Ariana Grande says she has been struggling with some symptoms of post-traumatic stress disorder following last year's suicide bomb attack at the end of her concert at Manchester Arena.
