Fans speculate over 'mysterious substance' in Spice Girls reunion photo

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"Did you see the line of powder on the iPhone in the back of the spice girls?!" questioned one fan on Twitter.

Somebody else added: "That sugar can't be good on the phone no?"

Other fans were quick to defend the band, saying that the white substance was “clearly a reflection”.

The 90s group posted a snap on Instagram announcing that they would be working together again on new projects.