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).

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.