The former Destiny's Child singer, 25, bought her first and only car nine years ago, and has resisted the temptation from following her boyfriend Jay-Z's passion for Bentleys and Mercedes.
She says, "I figured I needed to invest in something and I really love art."
"I don't buy cars. The first cheque I got when I was 16, I bought a car and I haven't bought a car since."
"I don't buy jewellery. I bought a really big diamond ring when I was 16, wore it and everyone said I was engaged, so I was like, 'I can't even wear it.' I haven't bought anything else since. I really am kinda cheap."