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Sir Mick Jagger has opened up about the death of his girlfriend L'Wren Scott in a new TV interview, admitting it has been a "hard year" and he threw himself into work to cope.

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The Rolling Stones frontman was asked about the tragedy during an interview on America's "Today" show, which aired on Friday to promote the new James Brown biopic "Get On Up" that the singer produced.

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Jagger looked sombre as he revealed he threw himself into work to deal with the pain of Scott's death.

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He said, "I'm doing OK. It's difficult. (It's been a) very hard year, but I got back into it by working on touring with the Stones in Europe and doing other things, including doing this great movie ... (I've had) a lot of support ... and I appreciate that."

Jagger was on tour with the band in Australia when his long-term partner took her own life at her apartment in New York in March, prompting the group to postpone shows in Australia and New Zealand.

The veteran singer returned to the stage in Norway in May.