Former contestants and guest stars enjoyed a sales boost out of last week's American Idol finale.

Chris Daughtry's self-titled Daughtry album made a 45% leap, moving 74,218 copies, according to Nielsen SoundScan. His single Home increased 17% with 85,925 in digital sales.

Other big winners:

• Kelly Clarkson's Never Again (80,451, up 26%)
• Green Day's Working Class Hero (24,472, up 440%)
• Gwen Stefani's 4 in the Morning (16,088, up 247%)

Idol winner Jordin Sparks placed four new songs in the digital top 200, including trophy tune This Is My Now (No. 12 with 74,303 downloads).