Beyonce in the promo of her new album 'B'Day' released on Sep. 5, 2006

Endorsing the beauty products of some of the world's top cosmetics firms have wrecked singer Beyonce Knowles' passion of buying toiletries at bargain stores, as she can't afford to be seen spending on rival products.

The former Destiny's Child singer admits she didn't think her career choices would ruin her shopping hobby at US stores like Target and Walgreens.

However, she insists that now she has to be careful what she buys.

"I love going to Target and Walgreens. You go in there and you buy the whole store. It's like, 'I've just come in here to get everything.' I buy a lot of things I'll never use," Contactmusic quoted her, as saying.

"(I buy) a lot of toiletries. It's hard now (because) I can't go. I see L'Oreal and my face is right there," she added.