The 'Shine Ya Light' singer was getting all her essential Halloween preparations in the city on Thursday evening (31 October) and hid her blonde locks under the colourful hairpiece.
Rita accessorised her wig with a matching furry bag and she also rocked her trademark red lips!
The 22-year-old, who is currently working on her second studio album, wore a smart olive green coat, but went for a more casual look underneath. Layering up, Rita wore a denim jacket with a red tartan hood and black dungarees. She rolled the trousers up at the ankles and teamed it with smart black shoes.
As Rita chatted away on the phone, she was also seen clutching a neon green wig in her hand! We wonder what her final outfit was?!
Meanwhile the pop sensation, who is dating DJ Calvin Harris, will be revealing all about her personal life as she appears as a guest on new TV chat show, The Conversation.
Rita tweeted last night: "This is the first time I completely open up about the truth, my life, my past, my insecurities, everything. Do NOT miss it!"
Catch Rita on The Conversation on Monday 4 November at 8pm on Lifetime.
Watch Rita's music video for 'Radioactive' below: