Oops!While inundated with congratulatory messages for winning her first\u00a0Grammy Award\u00a0on Sunday, Cardi B accidentally thanked late legend Tom Petty for a bunch of flowers.The 26-year-old songstress\u00a0took home the award for Best Rap Album\u00a0for "Invasion of Privacy," making her only the second female artist to win the award.NEWS: GRAMMYs 2019: Latin\u00a0Stars From Cardi B to Jennifer Lopez Brought the House Down - Watch!She then received some flowers which were accompanied by a note quoting lyrics by Petty -- who died of an accidental drug overdose in 2017 -- and appeared to mistakenly think the rocker had sent them.\n Cardi B thanked the late Tom Petty by mistake on Monday after she received a congratulatory flower bouquet for her Grammys win.\n (Getty)\u201cThank you Tom Petty for the flowers,\u201d Cardi wrote in a post on her Instagram Story, which has since been deleted. \u201cI left the room but the flowers were very big. I want to say thank you so much."NEWS: Cardi B Wins First GRAMMY, Offset Joins Her Onstage for SpeechCardi also thanked Petty for the accompanying note, describing the words as \u201cbeautiful.\u201dThe note quoted Petty\u2019s song \u201cWalls (Circus)," reading, \u201cYou\u2019ve got a big heart. So big it could crush this town.\u201dIt remains unclear who sent the bouquet, but fans have been throwing guesses around social media, with some suggesting Chris Brown, while others wondering if Cardi\u2019s nemesis, Nicki Minaj, could have sent the gift.NEWS: Cardi B Twerks All Over the GRAMMYs Stage for Showstopping 'Money' PerformanceWhile accepting her award at Sunday's ceremony, Cardi was joined by her husband, Offset, on stage, and became emotional during her speech."I can't breathe. Oh, my goodness, child," she said.\u00a0"The nerves. I am so bad. Maybe I need to start smoking weed.\u00a0I just want to say thank you to everybody that was involved."