 Six singles were released from the album . Its lead single " Fantasy " became the first single by a female artist to debut at number one on the US Billboard Hot 100 and went on to top the chart for eight weeks and became the second best @-@ selling single of 1995 in the country . The song topped the charts in Australia , Canada , and New Zealand and became a top @-@ five hit in Finland , France , and the United Kingdom . The second single " One Sweet Day " topped the Billboard Hot 100 for sixteen weeks and became the longest @-@ running number one single in American history , a record it still holds . It also topped the charts in Canada and New Zealand and peaked within the top five in Australia , France , Ireland and the Netherlands . <unk> , the singles from Daydream spent a combined six months at the top of the Hot 100 . To promote Daydream , Carey embarked on the short but successful , Daydream World Tour , visiting Japan and Europe . 
