Cher has urged Miley Cyrus to step up the quality of her live show and "be better, do better" after the pop icon was left unimpressed by the 20 year old's sexually-suggestive performance at the MTV Video Music Awards last month (Aug13). The former Hannah Montana star caused a stir after donning a barely-there outfit and showcasing her saucy dance moves while rubbing up against Robin Thicke as they performed his summer smash Blurred Lines onstage in New York. Her steamy set divided critics, with celebrities like Brooke Shields and Cyndi Lauper urging Miley to put some clothes on, but she remained defiant, insisting she "made history". Now the Believe hitmaker has become the latest star to weigh in on the controversy, and although she has no problem with Cyrus stripping off onstage, she feels the 20 year old should tone up first and work on her dance moves if she plans on ever repeating her performance. Cher tells USA Today, "I'm not old fashioned. She could have come out naked, and if she'd just rocked the house, I would have said, 'You go, girl.' It just wasn't done well. She can't dance, her body looked like hell, the song wasn't great, one (butt) cheek was hanging out. "And, chick, don't stick out your tongue if it's coated. If you're going to go that far, then think about it before you do it." She adds to Eonline.com, "Maybe she's thrilled and delighted - everyone's talking about it. And so, that's almost as good as it being great, you know. Especially kind of in this day and age. It doesn't make any difference if you're good. It just makes a difference if people are talking about it." Cher has had her fair share of performance controversies in the past - she upset conservatives by straddling a cannon in a barely-there outfit in her 1989 video for If I Could Turn Back Time, which was filmed onboard the battleship USS Missouri. MTV bosses initially banned the promo fearing Cher, dressed in a fishnet body stocking under a very revealing black one-piece bathing suit, was showing too much flesh for TV audiences.