It was technically a 'work' trip when Amy Winehouse was booked to perform five comeback gigs in Brazil. But after spending her free time relaxing by the pool and getting some much needed sunshine, the singer looked glowing as she arrived back in London yesterday. Now drug-free for over a year, the soul singer looked glam in a patterned dress and brown cardigan - and of course her signature ballet shoes - as she walked through Heathrow's arrivals hall. Looking good: Amy Winehouse looks healthier than she has done in years as she arrives back in London from Brazil The low-cut dress gave onlookers an eyeful of her 32D cleavage following a £35,000 boob job in October 2009. Over the past two weeks, she has been staying at the £700-per-night Santa Teresa hotel in Rio De Janeiro - a base for her five gigs in the South American country. It's rumoured that as well as being happy that she's finally back playing live, she is apparently pocketing a