POTW: Chris Brown, Drake, Ke$ha, George Michael, Britney
Katy Perry gives the mix to the crowd at her performance on NBC's 'Today' in Rockefeller Center in New York City on Aug. 27.

'DREAM' SEQUENCE: As previously reported, Katy Perry pockets her third Billboard Hot 100 No. 1, as "Teenage Dream" rises 2-1.

Perry previously led for seven weeks with "I Kissed a Girl" in 2008 and for six weeks with "California Gurls" (featuring Snoop Dogg), the newly-anointed champion on Billboard's Songs of the Summer 2010 chart.

With her latest Hot 100 coronation, Perry makes reaching the summit a reality for a song with the word "dream" in its title for the first time in 17 years. Here is a look at the select seven "dream"-y leaders in the chart's history:

Year, Title, Artist (Weeks at No. 1)
1967, "Daydream Believer," the Monkees (four)
1977, "Dreams," Fleetwood Mac (one)
1983, "Sweet Dreams (Are Made of This)," Eurythmics (one)
1986, "These Dreams," Heart (one)
1988, "Get Outta My Dreams, Get Into My Car," Billy Ocean (two)
1993, "Dreamlover," Mariah Carey (eight)
2010, "Teenage Dream," Katy Perry (one, to-date)

Perry's new leader ends an even longer gap between Hot 100 No. 1 titles paying ode to teenage years. "Teenage Dream" is just the third such song to reign. Mark Dinning spent four weeks at No. 1 with "Teen Angel" in 1960 and Ringo Starr's "You're Sixteen" ruled for a week in 1974.

Two lead artists have now claimed the last four newly-crowned Hot 100 leaders. Eminem's "Not Afraid" topped the May 22 chart. After Usher's "OMG," featuring will.i.am, returned for the last three of its four weeks on top, Perry began her six-week command with "California Gurls." Eminem's "Love the Way You Lie," featuring Rihanna, directly took over for seven weeks until the ascension of "Teenage Dream" this week.

The pattern marks the first time that the same lead acts have replaced each other atop the Hot 100 twice successively.

(The pressure is now on Eminem's next single, which Interscope Records has yet to choose, to continue the chart-topping volley).

HEART ON THE CHART: After returning to the Adult Contemporary chart for the first time since 1994 last week (with "Hey You," which climbs 30-28 in its second frame), Heart this week celebrates its first top 10 on the Billboard 200 since 1990.

The veteran Seattle rockers, led by sisters Ann and Nancy Wilson, bow at No. 10 "Red Velvet Car." The album is the band's first top 10 since "Brigade" reached No. 3 in May 1990 on the strength of lead single "All I Wanna Do Is Make Love to You," which reached No. 2 on the Hot 100.

The new album is Heart's seventh top 10 dating to its first, "Dreamboat Annie," in 1976. Here is a recap of the group's Billboard 200 top 10s:

Peak, Title, Debut Year
No. 7, "Dreamboat Annie," 1976
No. 9, "Little Queen," 1977
No. 5, "Bebe Le Strange," 1980
No. 1 (one week), "Heart," 1985
No. 2, "Bad Animals," 1987
No. 3, "Brigade," 1990
No. 10 (to-date), "Red Velvet Car," 2010

Beyond chart positions, "Red Velvet Car" affords another link to 1990. The album's closing cut, "Sand," is a newly recorded version of a song originally written and recorded by the Lovemongers, the Wilsons' 1990 acoustic side project.