Adele’s “21” maintained its hold on the U.S. album chart’s No. 1 slot for an eighth week, but a major competitor, Lady Gaga’s “Born This Way,” weighs into stores next Monday.

Sales for “21” were flat at 156,000 units, according to Nielsen SoundScan figures for the week ending May 15. Four new releases hit the top 10 this week, but none in that thin field presented a serious challenge to Adele’s reign.

While the British singer’s million-selling title should sustain another week at the pinnacle next week, Gaga’s highly anticipated new album should dethrone it in early June. Set will ride in on a juggernaut of publicity behind four hit singles, and its first-week chart position will benefit from an early Monday release on May 23.

This week, “21” and the ”Now 38″ compilation (No. 2 with 68,000 sold, off 45%) keep company with three newcomers to the top five.

Comedy trio the Lonely Island’s ”Turtleneck and Chain” (Universal Republic) scores the week’s top debut with sales of 68,000. It’s the “Lazy Sunday” threesome’s first appearance in the top 10.

Pop singer-songwriter Christina Perri’s “Lovestrong” (Atlantic) debuts at No. 4, shifting 58,000. Vocalist made her mark with the TV-driven “Jar of Hearts” last year.

Tyler the Creator’s “Goblin” (XL) moves in at No. 5 with sales of 45,000. Tyler Okonma is frontman for the noise-making, controversy-courting L.A. rap unit Odd Future, which heretofore has self-released its music.

Last week’s top debut, Beastie Boys’ “Hot Sauce Committee Part 2” (Capitol), falls four rungs to No. 6, moving 42,000.

Week’s other major bow is the Cars’ “Move Like This” (Hear Music), which arrives at No. 7 behind out-of-the-box sales of 36,000. It’s the ’80s new wave act’s first studio album in nearly a quarter of a century.

Filling out the top are Fleet Foxes’ “Helplessness Blues” (No, 8, 34,000 sold, down 62%), Jennifer Lopez’s “Love?” (No. 9, 33,000, off 60%) and Jason Aldean’s “My Kinda Party” (No. 10, 28,000, down 1%).