Now Playing: Inside J.Lo's New $22 Million NYC Apartment

Now Playing: Famous 'Friends' Apartment Recreated

Now Playing: Leonardo DiCaprio Buys Green Apartment in New York City

Now Playing: ABC News Live Update: Early evidence of new variant spreading in NYC

Now Playing: CDC guidelines to reopen schools met with criticism

Now Playing: Linsey Davis’ new children’s book ‘Stay This Way Forever’

Now Playing: ABC News Live Update: New COVID variant spreading rapidly through NYC

Now Playing: FDA to meet tomorrow about J&J emergency use authorization

Now Playing: Battle over Britney’s conservatorship

Now Playing: Stormy weather pattern for the West and the South

Now Playing: USWNT’s Alex Morgan scores first goal since giving birth

Now Playing: ‘Top Chef: All-Stars’ winner chef Melissa King shares how to make Chinese hot pot

Now Playing: Artists and experts celebrate power of hip-hop

Now Playing: Tim Cook, Dan Reynolds and Ryan Smith team up to support LGBTQ youth

Now Playing: SUV crash test video may provide answers in Tiger Woods wreck

Now Playing: South Dakota AG faces impeachment for involvement in deadly hit and run

Now Playing: Embattled Postmaster General warns of more mail slowdowns

Now Playing: Texas governor announces investigations into energy failure during winter storm

Now Playing: How Johnson & Johnson vaccine authorization could improve rollout

Now Playing: Johnson & Johnson vaccine effective against COVID-19 variants