Jennifer Lopez wore a sparkly, backless dress that plunged all the way down to her butt to celebrate her 56th birthday. See her party frock, here.

For an evening out, Sabrina Carpenter sizzled in a dangerously low backless red dress, which went all the way down to her butt.

Jennifer Lopez celebrated her 56th birthday on tour wearing a sexy silver backless dress—check out the pics.

Jennifer Lopez documented her 56th birthday on Instagram, where she wore a sparkling silver backless dress.

The Gist Sabrina Carpenter wore a backless dress that plunged all the way down to her butt while out to dinner. The "Manchild" singer seems to favor no-back designs, as she wore a blue iteration ...

Jennifer Lopez celebrated her 56th birthday on tour wearing a hot silver backless dress—check out the pics.

Jennifer Lopez celebrated her 56th birthday with a sparkling silver dress, wild dance moves, and a towering cake.

Jennifer Lopez's Backless Dress Plunges All the Way Down to Her Butt at Her 56th Birthday Party 56 has never looked so good.

Lauren Sanchez turned heads in a risqué sheer dress as she enjoyed a romantic date night with her husband Jeff Bezos in Saint-Tropez, France on Wednesday.