She's so fly! Kate Upton's eye-popping zero gravity <i>Sports Illustrated</i> shoot

Kate Upton just can't put a foot wrong right now… especially when her feet aren't on the ground!

The 21-year-old can now add "modelling upside down in mid-air" to her CV, floating around in a zero gravity plane for her latest Sports Illustrated shoot. See how she fared in the SI preview above!

Of course, Kate's not wearing space gear ala Sandra Bullock in Gravity — it's all skimpy gold swimsuits for this Barbarella bombshell moment! A little bit Gold Coast meter maid, even?

Kate's shoot appears in 50th anniversary edition of the Sports Illustrated Swimsuit Issue. The US model scored the back cover for the issue after being the front-page girl for the past two years. Controversial! But this year's cover girls Chrissy Teigen, Nina Agdal and Lily Aldridge did a fine job in her place. See below:

View slideshow: Classic Kate moments...