A video karaoke system comprises a first video source and a second video source, providing input to a mixing unit. The mixing unit provides a composite output that includes at least a portion of the video data from the first video source and a portion of video data from the second video source. The output of the mixing unit is configured to display on a display unit. The present invention also provides a method of mixing video data from plurality of video sources providing a combined output. The method comprises providing a plurality of video sources, and a region selecting unit selecting regions of interest from the plurality of video sources. The selected regions of interest from the plurality of video sources are then mixed to provide a combined output video image.