Adam Lambert is on the verge of his first No. 1 album on the Billboard 200 chart with "Trespassing." - Billboard

While it seems that Adam Lambert is on the verge of his first No. 1 album on the Billboard 200 chart with "Trespassing," a number of other acts are set to debut in the top 20 next week. Industry sources suggest that Lambert's "Trespassing" could sell around 70,000 to 80,000 copies by the end of the tracking week on Sunday, May 20. In a week without any other major new releases, and little competition, that may be enough to debut at No. 1 next week. Adele's "21" will likely be the runner-up, with between 60,000 to 70,000. The new Billboard 200 chart's top 10 will be revealed on the morning of Wednesday, May 23. - Billboard