We may have found Sean O'Brien's biggest, and most talented, fan.
Laura Doyle has her jersey and she is ready for the World Cup.
The 10-year-old from Ballon, Co. Carlow came up with a super take on the hit Rachel Platten number 'Fight Song'.
It has a rugby twists and features Carlow's favourite rugby son, The Tullow Tank.
Well worth a listen. It could yet become our unofficial anthem at the Millennium Stadium, Wembley, Olympic Stadium and, with any luck, Twickenham.
Thanks to Sabrina Doyle (Laura's mum) for the clip.
