Beyonce Knowles has splashed out on 25 pairs of designer shoes for her sister's 25th birthday.

The 'Run The World (Girls)' hitmaker - who closed The Glastonbury Festival in England last night (26.06.11) - arranged for the huge haul of luxury shoes to be collected from department stores Saks and Bergdorf in New York and delivered to her younger sibling Solange on her special day on Friday (24.06.11), according to the New York Post newspaper.

Solange celebrated her birthday with 20 friends at the Lavo (Palazzo) restaurant and nightclub in Las Vegas where the group enjoyed dinner before the singer-and-model was presented with a cake in the club.

Beyonce, 29, is known for her generosity towards her loved ones, last year she treated her rap star husband Jay-Z to a $2 million Bugatti Veyron Grand Sport car - the world's fastest road vehicle - for his 41st birthday on December 4.

The '99 Problems' rapper - who already has a vast car collection, was thrilled with the surprise speedy gift, which Beyonce had to order a year in advance.

A source revealed at the time: "Jay-Z has one of the most enviable collections of bling cars in the world - but even for him the Bugatti is special.

"Obviously the money isn't a factor for Beyonce, but he will be touched that out of everything she could have bought him, she chose something he'll treasure for years."