David Cook and David Archuleta - Dominate the Billboard Charts

American Idol David Cook, Runner-Up David Archuleta Dominate Billboard Download Charts (MTV)

He's been the nation's seventh American Idol for less than a week, but David Cook is already proving that, when it comes to marketable, bankable artists, he certainly fits the bill.

"The Time of My Life," the coronation song that Cook belted out at the close of last week's "Idol" finale, opens at #1 on next week's Billboard Hot Digital Tracks chart, which ranks the best-selling digital singles nationwide. With 236,000-plus downloads, Cook bumps Rihanna's "Take a Bow" from the top spot — but that's not all.

All told, 17 of the songs the 25-year-old Missouri guitarist performed during the show's most recent season are sprinkled throughout the list, according to the latest SoundScan figures.

For being this year's "Idol" runner-up, David Archuleta isn't doing so bad himself. While he failed to inspire the sort of download action that Cook has, his take on Elton John's "Don't Let the Sun Go Down on Me" was the country's 23rd-most downloaded song, with sales of nearly 50,700. Two spots behind that, with 49,100 downloads, is his first single, "In This Moment," followed at #36 by his cover of John Lennon's "Imagine," which generated close to 40,000 downloads. Archuleta has 11 other songs on next week's download chart.

Good news all around.