WATCH: Big Sean performs 'Moves' exclusively for the 'GMA' audience

The rap star wows the Central Park crowd with a performance of his hit song.

WATCH: Big Sean jams out to 'Jump Out The Window' live on 'GMA'

The singer rocks out as part of the "GMA" Summer Concert Series.

WATCH: Heart transplant survivor credits friends with saving her life

Amy Silverstein's new memoir, "My Glory Was I Had Such Friends," details the lengths a group of nine women went to help Silverstein as she awaited her life-saving surgery.

WATCH: Big Sean discusses hometown Detroit's honoring him with 'Big Sean Day'

The rapper said the city council also gave him a key to the city, which he called "amazing."

WATCH: How smartphone apps can be used to track your health

ABC News' Kayna Whitworth reports on new apps that can be used to help people manage and collect information about chronic illnesses.

WATCH: Could the trendy alternate-day fasting diet be putting you in danger?

ABC News' Mara Schiavocampo reports on new research that casts doubt on the effectiveness of the trendy diet where you fast every other day.

WATCH: New parenting alert for kids and pools

About 350 children younger than 5 drown in swimming pools each year, most between the months of June and August, according to the Consumer Product Safety Commission.

WATCH: Warning for swimmers as sharks are sighted on both coasts

Beachgoers are advised to be alert during the holiday weekend and to follow precautions by staying close to shore and never swimming alone.

WATCH: 'GMA' celebrates National Social Media Day

Plus, new reports say the commonly taught i before e except after c spelling rule is a lie.