Her debut solo album, "Vitamin C", peaked on the "Billboard" 200 at number 29 and was certified Platinum by the RIAA. The album's first single, "Smile", climbed to number 18 on the "Billboard" Hot 100 and was also certified Gold by the RIAA. The second single from her album "Me, Myself & I", failed to chart. However, the third single "Graduation (Friends Forever)" made a huge impact on the radio, peaking at number 12 on the Top 40 Mainstream Chart, number 38 on the "Billboard" Hot 100, and number 2 on the ARIA Charts, and was certified Platinum in Australia. The song is considered a landmark in graduation-themed songs and is still hugely popular amongst graduation parties and ceremonies. It has appeared on the iTunes Music Chart at the end of every school year since the chart's inception. In the summer of 2000, a DJ from the Republic of Ireland picked up a copy of the single while on holidays in New York. The song was subsequently one of the biggest hits in 2000 in the Republic of Ireland peaking at number 4 in the charts and still receives massive airplay each summer.