Blake Lively Clothed in Venice

Blake Lively had angst all over her face Thursday ... as she cruised the canals in Venice, Italy with Leonard DiCaprio -- the first time she was photographed since those nude photos hit the Internet.

It appears Blake was using an iPhone 4 on the boat ... an upgrade from the old iPhone featured in the naked pics ... especially when it comes to the camera feature.

Leo and Blake 100% PROOF Positive ... Mostly

We got the photo evidence Leonardo DiCaprio and Blake Lively were absolutely, positively ... at the same party in France! So, Leo's definitely dating her ... or some other woman.

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