Lindsay Lohan and sister Ali exercise at “Muscle Milk Light” Women’s Fitness Retreat

Both sisters Lindsay Lohan and Ali Lohan exercise to maintain their svelte body at “Muscle Milk Light” Women’s Fitness Retreat on Friday (June 11) in Beverly Hills, Calif.

Both of them look great in Under Armour sports bras.

Image source from http://justjared.buzznet.com

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Lindsay Lohan and sister Ali exercise at “Muscle Milk Light” Women’s Fitness Retreat