The Saturdays star told fans that a report in a newspaper today was true, but insisted that she is still friends with Humes.
"Hey guys thanks for messages!" she wrote on Twitter. "It's all a bit odd to share a break up!
"We have split but, we are still very much friends! You guys are lovely."
The couple began dating in February and moved in together a few months later.
Wiseman also admitted that she is "super nervous" about competing in a special version of Strictly Come Dancing for BBC Children In Need, which is being filmed tonight.