Christmas crowds in central Glasgow.The six-year-old from Rutherglen grabbed a busker’s mic for an impromptu rendition of a seasonal Scots poem she learned in school.As well as getting a standing ovation in George Square, a video shot by beaming mum Kerry-Ann has now reached a global audience.Karla Rose was watching the busker play when he offered her his mic and a bashful Karla accepted.As she began her rendition of a festive poem, she drew the attention of passers-by who were keen to cheer her