Emma Roberts is "obsessed" with sushi.

The '' actress is trying to vary her diet after spending a lengthy period of time eating nothing but the healthy Japanese food - which consists of cooked vinegared rice topped with other ingredients, such as fish or other seafood - but admits she is finding it difficult.

She said: "I've been attempting to eat healthily lately.

"A month ago, I was eating sushi every day of my life because I became really obsessed with it.

"But recently I've been trying to mix it up a bit and incorporate vegetables into my diet, which is a problem because I'm not a fan."

The 19-year-old star recently spent time in London filming '' and admits she couldn't stop herself from splashing out on new outfits every time she had a break.

She said: "We tried to shop in our lunch break.

"I love anything from designer to vintage to Topshop. That's what I love about London - you can find such an amazing mixture of everything."