Justin Bieber, Selena Gomez make surprise visit at Children's Hospital

Deborah Kim

Singers Justin Bieber and Selena Gomez arrive at the 2011 Vanity Fair Oscar party in West Hollywood, California February 27, 2011. REUTERS/Danny Moloshok (UNITED STATES - Tags: ENTERTAINMENT) (OSCARS-PARTY)

It's getting harder and harder to hate Hollywood's hottest tween couple.

Gather reported Justin Bieber and Selena Gomez visited the Children's National Medical Center in Washington, D.C. this past weekend and made the days of dozens of sick kids.

The couple was in the capital city for Bieber's Christmas in Washington concert at the White House.

Jacqueline Bowens, Executive VP of External Affairs of Childrens National Medical Center, told Hollywood Life that the couple had a lot of fun with the kids.

The kids loved them! It was a surprise for them. Justin spent quality time with all of the kids, talked to them, took pictures with them and sang to them.

Victoria Justice and Conan O'Brien, who were both also part of the concert, joined Bieber and Gomez.

Proceeds from the concert have gone to the hospital for the past 30 years to help "make it possible for 1000s of kids to have access to the best medical treatment and care. And it allows us to treat children who cant afford medical care. We survive of the generosity of our community and philanthropy," Bowens said.

A source told HL that Gomez was not featured in official hospital photos because she was not a part of the concert, but she did take photos with those who asked.