Solange Knowles: Blue Ivy is ‘beautiful’

Solange Knowles has tweeted about her sister Beyoncé’s first child, calling Ivy Blue Carter the ‘most beautiful’ baby girl in the world.

On Saturday, Beyoncé gave birth to her and Jay-Z’s first child in New York, having first revealed her pregnancy in August.

Solange, mother to 7-year-old son Julez, simply tweeted: ‘The most beautiful girl in the world.’