VIDEO : Lady Gaga's Childhood Piano is Going on Auction For an Estimate $200,000.

Singer Lady Gaga arrives at the 88th Academy Awards in Hollywood February 28, 2016. NEW YORK -- Lady Gaga was only 5 years old when she wrote her first song on an upright piano that her grandparents bought. Now the instrument that inspired the pop music sensation is going on the auction block at a pre-sale estimate of $100,000 to $200,000. The piano is being offered at Julien's Auctions' "Music Icons" memorabilia sale at the Hard Rock Cafe New York on May 21.