“Stay” by Rihanna featuring Mikky Ekko jumps to #1 on the all-format Radio Songs chart, displacing Bruno Mars’ “When I Was Your Man,” which had ruled for five weeks. It’s Rihanna’s 11th #1 on the chart, which puts her in a tie with Mariah Carey for the most #1s in the chart’s 22-year history. (This isn’t the Hot 100, but rather the key radio chart that is a component of the Hot 100.) On the Hot 100, “Stay” rebounds from #6 to #3, which matches its highest ranking to date.

Wanna know the rest of the artists with the most #1 hits on the Radio Songs chart? Billboard’s Gary Trust notes that Usher is in third place with seven #1 hits, followed by Ludacris and Kanye West, with six each. 50 Cent, Beyonce, Boyz II Men, Bruno Mars and Katy Perry have each had five.

Carey and Usher are both reality TV stars this season (on American Idol and The Voice, respectively). It’s precisely these Radio Songs smashes that gave them the credibility to land these lucrative TV gigs. (Imagine what kind of money the networks would throw at current radio titans, such as Rihanna, Mars or Perry. Of course, those artists are a little busy just now.)

As recently as seven months ago, few of us had heard of Macklemore & Ryan Lewis. This week, the hip-hop duo (rapper Ben Haggerty, 29, and producer Ryan Lewis, 25) has two of the top three hits on the Hot 100. “Can’t Hold Us” (featuring Ray Dalton) jumps from #5 to #2. (It will probably rise to #1 next week.) “Thrift Shop” (featuring Wanz) dips from #2 to #3. Moreover, they have the top two hits (and back-to-back #1 hits) on Hot R&B/Hip Hop Songs. And their debut album, The Heist, returns to the top 10 on The Billboard 200.

Macklemore & Ryan Lewis are the first act to have two of the top three hits on the Hot 100 in the same week since Rihanna scored in October 2010 with Eminem’s “Love The Way You Lie” (on which she was featured) and her own “Only Girl (In The World).” They’re the first duo or group to achieve the feat this since the Black Eyed Peas scored in 2009 with “Boom Boom Pow” and “I Gotta Feeling.”

A third song by the duo, “Same Love” (featuring Mary Lambert), rebounds from #100 to #93 in its sixth week. The song has climbed as high as #89.

Here’s an irony for you: A price reduction to 69 cents enabled Bruno Mars’ “When I Was Your Man” to bump “Thrift Shop”—a song about hunting for 99-cent bargains—out of the #1 spot on the Hot 100. Mars’ song was discounted to that price in both the iTunes and Amazon MP3 stores, which put it far below the standard $1.29 price of most current hits. This was a shameless (and effective) bid to give Mars’ hit the final push it needed to reach #1. The song sold 340K copies during the week, which represents a 45% gain over the previous week. “Thrift Shop,” which is the only song in digital history to top 300K in weekly sales nine times, sold 211K during the week, a 25% drop from the previous week.

“When I Was Your Man” is Mars’ fifth #1 on the Hot 100. Mars has amassed his first five #1 hits faster than any male solo artist since Elvis Presley. Mars first charted on Feb. 13, 2010 as the featured artist on B.o.B’s “Nothin’ On You.” Thus, he has piled up five #1 hits in three years and two months. Presley amassed his first five #1 hits in less than a year (March 3, 1956 to Feb. 9, 1957, when “Too Much” bumped Guy Mitchell’s “Singing The Blues” out of the top spot).

Only two other artists have amassed five or more #1 hits since January 2010. Rihanna leads with seven in this young decade. Katy Perry has had six. Among male solo artists, Mars is way out front. Eminem is in second place with two #1 hits since January 2010.

(Wanna know who else has had two or more #1 hits in this decade? Adele has had three. Ke$ha, LMFAO and Maroon 5 have each had two.)