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OTRC: Bruno Mars is No. 1 on Billboard chart with 'Locked out of Heaven'

Bruno Mars appears in a photo posted on his Facebook page on January 25, 2012. (Andreas Laszlo Konrath)

Bruno Mars is dominating the Billboard charts - again.

The 27-year-old singer's hit song, "Locked Out of Heaven," is No. 1 on the Billboard Hot 100 singles chart for the second week in a row, keeping Rihanna's previously No. 1 single "Diamonds" at No. 2.

The Grammy-Award winning singer has had two previous No. 1 solo hits -- "Just the Way You Are" and "Grenade" and was featured on B.o.B's chart-topping single "Nothin' on You." Mars has become one of nine male soloists in the Hot 100's 54 year history to tally at least two weeks on top with each of his four No. 1 hits, according to Billboard.

On December 18, the smooth singer performed "When I Was Your Man" from his sophomore album, "Unorthodox Jukebox," on the season 3 finale of "The Voice." He was joined that evening by performer Rihanna, who also performed her previously No. 1 hit song "Diamonds."

The singer debuted "Locked Out of Heaven" during a Google+ Hangout on October 1. According to MTV, the singer told a fan who participated in the hangout that his favorite lyric was "But swimming in your water is something spiritual."

He also described the theme of the album as "sensual, sensual and sensual."

"Unorthodox Jukebox" is Mars' second studio album and was released on December 11. The record debuted at No. 2 on the Billboard 200 chart thanks to sales of 192,000, according to Nielsen SoundScan, and holds at No. 1 on the Digital Songs chart. The singer's sophomore album was beat in its debut week by Taylor Swift's fourth studio album, "Red."

Rihanna's song "Diamonds" from her recently released album "Unapologetic" remains in the No. 2 position on the chart, while The Lumineers' "Ho Hey" moved up to nab the No. 3 spot.

Ke$ha's song "Die Young" dropped to No. 4, while Maroon 5's "One More Night" held their position at No. 5. Flo Rida's catchy tune, "I Cry," secured a spot at No. 6.

Check out Bruno Mars' song "Locked Out of Heaven" below.

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