Lady Gaga and on-again, off-again boyfriend Michael Polansky seen taking in Las Vegas residency concerts for U2 and Katy Perry

Lady Gaga & Boyfriend Michael Polansky Attend U2 & Katy Perry's Las Vegas Residency Shows!

Jennifer Hudson dazzles in a sexy emerald green gown as she belts out hits at Las Vegas fundraiser for the Shaquille O'Neal Foundation

Katy Perry Shares Silly Revelation About 'Hetero Relationships' After Watching Viral David & Victoria Beckham Clip