The singer was spotted strutting down Old Compton Street in Soho while miming a song and surrounded by fans taking photos of her.
Minogue was dressed in short denim hot pants, a leather biker jacket adorned with a giant red heart, and a pair of big sunglasses.
Later in the evening, the Australian starlet was seen on the back of a motorbike with her hand pointed in the air.
It has not been confirmed whether she was shooting a new music video. However, Minogue will release an orchestral reworking of her greatest hits later this year.
The new album will be part of her K25 project, which celebrates her 25 years in the music industry since 1987's 'Loco-Motion'.
The new shoot follows a series of Anti-Tour shows in Australia and the UK, which saw Minogue perform a collection of B-sides and rarities in intimate venues.
> Kylie Minogue waxwork unveiled in Australia - pictures
Watch a fan clip of Kylie Minogue filming in Soho, London below: