The Radio 1 DJ, who is currently on maternity leave after giving birth to first son Rex in February, curated indoor festival, FestiFeel.
Rocking David Bowie-esque face glitter, Fearne arrived at the one-day music event in a FestiFeel t'shirt and leopard print leggings, teamed with black pixie boots.
Held at London's Islington Metal Works, the event is part of CoppaFeel's campaign for breast awareness.
Clearly enjoying the event, Fearne tweeted updates to her fans throughout the day and even posted a picture of son Rex "getting into the spirit of things".
Cherished son Rex, four months old, can be seen wearing a 'Boob man' t'shirt in honour of the FestiFeel event. Cute!
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