Building upon her youth gold from the previous year, she added another gold medal to her collection at the 2010 Junior World Championship in Moncton. Although windy conditions reduced the level of performance, a first time clearance at 4.15 m sealed her victory over the older girls and she added an extra ten centimetres between herself and Holly Bleasdale for a winning mark of 4.25 m. Her achievements made her one of the headline athletes at the first ever Summer Youth Olympics in Singapore. She duly delivered on her favourite status by winning the competition at a height of 4.30 m. Dismissing the challenge of the Silke Spiegelburg's world junior record of 4.48 m, Bengtsson went straight for the Swedish senior record, but again 4.52 m proved too much for the young athlete.