Geike Arnaert (Dutch pronunciation: [ˈɣɛikə ˈʔɑrnaːrt]; born 13 September 1979) is a Belgian singer, best known for being the lead vocalist of the band Hooverphonic from 1997 until 2008 and again since 2020. Geike was born in Poperinge and grew up in Westouter, a town that is close to the French border. From a young age she was captivated by music and therefore she decided to audition for the Belgian band Hooverphonic, the group of guitarist Raymond Geerts and Alex Callier.

Although Hooverphonic had been performing since the mid-90s, it wasn't until 2000 before they scored a hit in the Flemish Ultratop 50. With "Mad About You" the group spent 14 weeks in the charts, peaking at number 23. The Magnificent Tree, the album which contained "Mad About You", became an even bigger success in Belgium.