Most of the record-setting achievements spotlighted in Joel Whitburn's newly-published reference book Top Pop Singles 1955-2010 are positive: artists with the most chart hits, singles that spent the most weeks at #1, and the like. But there's one list in the book that no artist would want to appear on: the "one-hit wonders" of the rock era. These are artists who had one top 10 hit and then never returned to (or even bubbled under) the Hot 100. And who's the biggest one-hit wonder of all? Daniel Powter, whose 2006 smash "Bad Day" topped the chart for five weeks. Powter is the only artist in the rock era to spend as many as five weeks at #1 with his first and only chart hit.

Rather than go all the way back to 1955, let's zero in on the more recent past. And let's raise the bar a little and focus on artists who had top five hits. Here are the 22 artists who cracked the top five on the Hot 100 from 1985 through 2010 and have yet to return to (or even "bubble under") the chart. Some of

This week, let's zero in on albums by three high-profile female singers. Beyonce's 4 becomes the superstar's fourth consecutive studio album to debut at #1. Adele's 21 becomes the first album to spend its first 19 weeks inside the top three since Backstreet Boys' Millennium did it in 1999. And Lady Gaga's Born This Way drops out of the top 10 after just five weeks. That's one of the briefest initial runs in the top 10 of any of the albums that have sold 1 million copies in one week.

Beyonce's album sold 310,000 copies in its first week. That tally may look a little skinny, but it trails the first-week totals of only two 2011 albums: Gaga's discount-aided Born This Way (1,108,000) and Adele's Grammy front-runner 21 (352K). B is ahead of Britney Spears' Femme Fatale (276K) and Chris Brown's F.A.M.E. (270K). That said, it's a little behind B's past studio albums: Dangerously In Love (317K in 2003), B'Day (541K in 2006) and I Am...Sasha Fierce (482K in 2008).

The slower start for the new

How slow were album sales in the first half of 2011? Only two albums have sold 1 million copies so far this year, and one of those famously had a little help from a near-giveaway promotion. The paucity of hits makes Adele's achievement all the more remarkable. Her sophomore album, 21, has sold 2,517,000 copies, which would be considered a solid total in any sales climate.

Three of the five best-selling albums so far this year never reached #1 on The Billboard 200, which shows that topping the charts isn't everything. Mumford & Sons' Sigh No More and Jason Aldean's My Kinda Party both peaked at #2. Bruno Mars' Doo-Wops & Hooligans peaked at #3.

Three tracks appear on two albums each in the mid-year top 10. Bruno Mars' "Just The Way You Are," Chris Brown's "Yeah 3X" and Rihanna's "Only Girl (In The World)" all appear on Now 37, as well as those artists' studio albums. "Just The Way You Are" and "Only Girl (In The World)" both won Grammys in February, for Best Male Pop Vocal Performance

NBC's surprise hit The Voice has been good for its contestants, but it's been great for its judges. All four of the show's judges have hits in the top 40 on this week's Hot 100. The key contestants are also on the chart, but a little lower.

"Moves Like Jagger" by Maroon5 featuring Christina Aguilera debuts at #8. It's the fourth top 10 hit for the pop group fronted by judge Adam Levine, following "This Love," "She Will Be Loved" and "Makes Me Wonder." It's Aguilera's ninth. In addition, Blake Shelton jumps from #21 to #15 with his country crossover hit "Honey Bee" while Cee Lo Green drops from #29 to #35 with his inexhaustible "F**k You (Forget You)."

As for the contestants, Javier Colon's version of Coldplay's "Fix You" debuts at #52, Dia Frampton's version of R.E.M.'s "Losing My Religion" bows at #54 (and her version of Kanye West's "Heartless" drops from #57 to #82 in its third week), Vicci Martinez's version of Florence + the Machine's "Dog Days Are Over" bows at #68 and Xenia's