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"Bruno Mars has topped the Billboard Hot 100 with &amp;#039;Locked Out of Heaven&amp;#039;. The singer climbs two to one to gain his fourth US number one, following &amp;#039;Nothin&amp;#039; on You&amp;#039; with B.o.B, &amp;#039;Just the Way You Are&amp;#039; and &amp;#039;Grenade&amp;#039;.   Elsewhere, Rihanna&amp;#039;s &amp;#039;Diamonds&amp;#039; falls one to two, The Lumineers lift five to four with &amp;#039;Ho Hey&amp;#039;, and Flo Rida&amp;#039;s &amp;#039;I Cry&amp;#039; jumps eight to six.  Justin Bieber and Nicki Minaj&amp;#039;s &amp;#039;Beauty and a Beat&amp;#039; leaps 14 to nine, and Ne-Yo&amp;#039;s &amp;#039;Let Me Love You&amp;#039; completes the Top 10.  Further down the chart, Swedish House Mafia shift 21 to 14 with &amp;#039;Don&amp;#039;t You Worry Child&amp;#039;, Taylor Swift&amp;#039;s &amp;#039;I Knew You Were Trouble&amp;#039; bounds 32 to 15, and Pink ascends 20 to 16 with &amp;#039;Try&amp;#039;.  Ed Sheeran leaps 23 to 18 with &amp;#039;The A Team&amp;#039;, Mariah Carey re-enters at 29 with &amp;#039;All I Want For Christmas&amp;#039;, and Kelly Clarkson reaches a new peak at 52 with &amp;#039;Catch My Breath&amp;#039;.  Elsewhere, Tamar Braxton debuts at 57 with &amp;#039;Love And War&amp;#039;, Bruno Mars lands at 69 with &amp;#039;When I Was Your Man&amp;#039;, and Maroon 5 start at 77 with &amp;#039;Daylight&amp;#039;.  The top ten singles are as follows (click where possible for our reviews):  1. (2) Bruno Mars: &amp;#039;Locked Out of Heaven&amp;#039; 2. (1) Rihanna: &amp;#039;Diamonds&amp;#039; 3. (3) Ke$ha: &amp;#039;Die Young&amp;#039; 4. (5) The Lumineers: &amp;#039;Ho Hey&amp;#039; 5. (4) Maroon 5: &amp;#039;One More Night&amp;#039; 6. (8) Flo Rida: &amp;#039;I Cry&amp;#039; 7. (7) Phillip Phillips: &amp;#039;Home&amp;#039; 8. (6) fun.: &amp;#039;Some Nights&amp;#039; 9. (14) Justin Bieber ft. Nicki Minaj: &amp;#039;Beauty and a Beat&amp;#039; 10. (9) Ne-Yo: &amp;#039;Let Me Love You (Until You Learn to Love Yourself)&amp;#039; Watch Mars&amp;#039;s video for &amp;#039;Locked Out of Heaven&amp;#039; below:       "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/music/us-billboard-chart/news/a445057/bruno-mars-scores-fourth-us-number-one-single/>