Season 8 "American Idol" winner Kris Allen and runner-up Adam Lambert are climbing the Billboard Hot 100. Read on to see which "Idol" contestant is in the lead! The two have a combined nine debuts on the Billboard Hot 100 singles chart, but it is Kris who is ahead with his recording of "No Boundries" at No. 11 and his recording of "Heartless" at No. 16. Adam's rendition of "Mad World" comes in at No. 19 on the chart, putting the song -- originally performed by Tears for Fears -- on the Hot 100 for the first time.I can't wait to download their songs.