As the summer season rolls in, Jennifer Aniston chooses to wear a tube top while shopping at ‘Fred Leighton Rare Collectible Jewels’ on Madison Avenue in New York City. Later, she heads to the Metropolitan Museum of Art. Meanwhile, Katie Holmes seems to have mastered the pegged-jeans look, while Jen opts for baggy jeans. On another note, Jen’s ex-boyfriend John Mayer was seen enjoying a meal at the popular Japanese restaurant Nobu Next Door on Thursday.