The Billboard Hot 100:
As previously reported , fun.'s "We Are Young," featuring Janelle Monae, spends a sixth week atop the Billboard Hot 100, making history as the first song to log six weeks of at least 300,000 in digital sales, according to Nielsen SoundScan. Who else is having fun on the Hot 100? Interestingly, several artists who have teamed up on tracks:
-- Jennifer Lopez, Pitbull: Reteaming again a year after "On the Floor" soared to No. 3, the pair sends "Dance Again" onto the Hot 100 at No. 27 with 118,000 downloads sold, according to SoundScan, after the new collaboration's video premiered on "American Idol" on April 5. "Floor" sold a heftier 223,000 in the week following its "Idol" premiere - and debuted at No. 9 - in March 2011.
-- Kanye West, Big Sean, Pusha T, 2 Chainz: In another showing of multi-artist star power, the rappers bow at No. 38 with "Mercy." The track, from the upcoming G.O.O.D. Music compilation album, arrives with 117,000 downloads sold.
-- Kenny Chesney, Tim McGraw: Sensing a trend? Country gets in on the collaborative process, too, as the singers' "Feel Like a Rock Star" roars onto the Hot 100 at No. 40. Airplay and sales drive the debut, as the song enters Hot Country Songs at No. 13 with 22 million in audience, according to Nielsen BDS - marking the chart's second-highest debut since the survey adopted Nielsen BDS data in 1990 - and Country Digital Songs at No. 3 with 93,000 in digital sales. Chesney and McGraw premiered the song on CBS' April 1 telecast of the 47th Annual Academy of Country Music Awards in Las Vegas.
-- Nicki Minaj, Chris Brown: We're not done yet. As Minaj tops the Billboard 200 with Pink Friday: Roman Reloaded, and lead radio single "Starships" bullets at No. 6 on the Hot 100, three other cuts from the set debut: "Right By Your Side," featuring Brown (No. 51; 72,000 downloads); "Beez in the Trap," featuring 2 Chainz (No. 78; 35,000); and, "Va Va Voom" (No. 79; 46,000). Despite its lowers sales total, "Beez" ranks higher on the Hot 100 due to its radio buzz; it rises 58-57 in its third week on R&B/Hip-Hop Songs.
-- K'Naan, Nelly Furtado: And, one more pairing. The singers enter at No. 99 with "Is Anybody Out There?" As pop airplay builds - the song bullets at No. 30 on the Mainstream Top 40 chart - "Anybody" re-enters Pop Digital Songs at No. 38 (21,000, up 57%). The track introduces the Somalian-born K'Naan's forthcoming album, Country, God, or the Girl.
The Billboard 200:
Nicki Minaj claimed her second No. 1 album this week on the Billboard 200  as Pink Friday: Roman Reloaded charged straight in atop the list with 253,000 copies sold according to Nielsen SoundScan. Minaj's latest was one of four new arrivals to the top 10, which we recapped earlier in the week. Let's look at some of the movers and shakers farther down the list:
-- Kelly Clarkson: Stronger (26-12; 33,000; up 117%) was one of a number of albums discounted to below $8 last week in the iTunes Store. In turn, it saw a massive overall gain and a 108% life in downloads. Target also got in on the discount action, sale-pricing the set for $7.99.
-- Taylor Swift: The Academy of Country Music Awards (April 1) winner for entertainer of the year is one of many acts on the chart that see gains in the wake of the annual kudocast. Her most recent studio album, Speak Now, is up by 80% and jumps from No. 70 to No. 37.
-- Gavin DeGraw: The singer -- and "Dancing With the Stars" contestant -- performed his Sweeter album's "Soldier" on the series finale of the CW's "One Tree Hill" (April 4). The exposure helps the album net a 134% sales jump this week and it reenters at No. 84 with 6,000.
-- 50 Cent & Nirvana: Both 50 Cent's Get Rich Or Die Tryin' and Nirvana's Nevermind are aided by $3.99 pricing in Amazon MP3's store. 50's album reenters at No. 112 (5,000) up by 117% in overall sales while Nirvana's title jumps by 116% (No. 136 with 4,000).
-- Chris Tomlin: Due to Easter (April 8) and promotions focused around the holiday, many Christian and gospel albums saw increases in sales, like Chris Tomlin's How Great Is Our God: The Essential Collection at No. 121. The set sold 5,000 last week with a 75% gain.