Fireworks exploded over the Charles River as seen from the roof of a Boston University building at 33 Harry Agganis Way.

Fireworks lit up the Boston sky during a performance by Michelle Brooks-Thompson and Melinda Doolittle.

People sang along with the Boston Pops performance on the Charles River Esplanade during Fourth of July celebrations.

The Boston Crusaders drum and bugle corps took to the stage during the 42d Boston Pops Fireworks Spectacular at the DCR Hatch Shell Saturday.

People took in the light show as the Boston Pops performed Saturday.

Boston Pops conductor Keith Lockhard led the orchestra at the Hatch Shell.

Eli (left) and Sam Schmidt played with flags on the lawn near the Esplanade.

People cheered for the Navy Leap Frogs during the aerial show.

Members of the Navy's Leap Frogs created streams of colored smoke as they jumped from a plane for an aerial show.

Tina Jones relaxed before the free fireworks show.

James Barnes, of Brighton, had a seat in the front row for the 42d Boston Pops Fireworks Spectacular.

Kate Bullock and her niece McKenna Duggan waited on the grass.

Martha Murphy and her mother Jodie Murphy (right) used plastic bags while waiting out the rain.

John and Erin Pennington kissed while wearing American flag themed mustaches.

Chris Tuttle played with his daughter Clare.

A man slept under a tent early Saturday.