MTV News reports that Pink and on/off boyfriend Carey Hart are officially engaged, according to the singer’s management, who confirmed the news on Thursday. According to eyewitnesses at the Pro 250 class finals in Mammoth, California, on Sunday, Pink made the proposal. During the motocross champion’s third lap on the race, Pink wrote on a pit board, “Will You Marry Me?” and held it up in front of the grandstands, according to the Mammoth Times. Then, as Hart continued another lap, Pink wrote on the board again, this time, “I’m serious!” Hart then pulled off the track, letting his competitors pass him, and picked up the singer. Read more.