Over the weekend, Justin Bieber and Willow took the stage in Birmingham, England to kick off Bieber's My World tour of Europe and Australia. Willow, who just released her latest single '21st Century Girl,' is joining Bieber on tour as his opening act.

Bieber performed hits like 'Baby' and 'Somebody to Love' to screaming fans, as he wore a white and silver jacket, purple kicks and glasses to match. Willow looked fashionably adorable as always, rocking a futuristic blue and pink track suit. Check out these Justin Bieber pictures and Willow pictures and let us know which photo you like best.

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