The musician was pictured earlier today (25 March) with Leah, who was a runner-up on last year's show.
In fact, Leah, 24, has even been in the studio with the Black Eyed Peas star, ahead of the release of her debut single, No Ordinary Love.
In an interview earlier this year, Leah said: "I have so much to thank this man for – always believing in me, always fighting for me, always giving me incredible opportunities."
She added: "Will is always making me laugh when I should be nervous and always teaching me."
Despite losing out to Andrea Begley on The Voice last year, the Northern Irish singer has remained close to Will.i.am.
In fact, the American superstar even let Leah perform at the opening of his world tour last December.
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