Pharrell Williams, Sara Bareilles Perform Live on NBC's TODAY

Pharrell Williams, Sara Bareilles Perform Live on NBC's TODAYAs part of TODAY's summer Toyota Concert Series, two chart-topping singer-songwriters are set to perform their music live on the plaza.

Kicking things off today, June 5, is Pharrell Williams, the man behind the summer smash "Happy."

On Friday, June 6, popular artist Sara Bareilles will sing songs from her Grammy-nominated album "The Blessed Unrest."

Fans and visitors are encouraged to come to the plaza for the live performances. Viewing is on a first-come, first-served basis outside TODAY's window-on-the-world studio at 49th Street and Rockefeller Plaza in New York City. Fans should arrive by 6 a.m. for best viewing.

Who else is performing this summer? Find the full lineup here.

About TODAY:

NBC News pioneered the morning news program when it launched TODAY in 1952 with Dave Garroway as host. For more than 60 years, TODAY has provided a daily live broadcast of the latest in domestic and international news, weather reports, and interviews with newsmakers from the worlds of politics, business, media, entertainment and sports.

TODAY is renowned for providing its audience with a "window on the world," bringing viewers breaking news as it Pharrell Williams, Sara Bareilles Perform Live on NBC's TODAYhappens and often broadcasting from locations around the globe. TODAY's longtime home at New York's Rockefeller Plaza attracts thousands of visitors each year to peer into its windows and become part of TODAY's broadcast. The Emmy Award winning program is anchored by Matt Lauer, Savannah Guthrie, Al Roker and Natalie Morales. Don Nash is the executive producer.