The Little Mix singer braved the icy waters on her 30th birthday to raise money for Cancer Connections at the annual event in her hometown of South Shields, South Tyneside.
According to public company records, the singer raked in almost £900K in one year, while former bandmate Jesy made a significantly lower amount with £140K over the same period of time.
Little Mix s Leigh-Anne Pinnock, Jade Thirlwall and Perrie Edwards have been forced to call in lawyers after a number of their previously unreleased songs were leaked online.
The Little Mixer, 28, showcased the inking on her Instagram story, which, at a first glace, was hard to decipher - but it represents the day that the band were formed.