Dogs act like toddlers when you need help - but cats just watch. Scientists compared 3 groups: pet dogs, cats, and human toddlers in an experiment where a human parent hides and pretends to look for an object. 75% of dogs and children helped. Cats only helped if it was in their personal interest.

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DTF St. Louis premieres March 1 at 9 p.m. ET.

She sips tea throughout the interview in an effort to protect her voice, which is "really delicate" - not from the concerts, but because "I've been talking too much to my friends".

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She started after her brother Peter died from a brain tumour in 1989 when he was just 24.