Facebook, which owns Instagram and WhatsApp, released a statement on Monday evening, confirming the sites were beginning to come back online.
Twitter remained one of the only major social media platforms unaffected and users shared their reactions on the site.
Country music queen Parton, 75, shared a Gif of her striding through saloon doors and wrote: “Everyone showing up to @Twitter
today while @Facebook @instagram @WhatsApp are down like…”
Adele, who has updated her social media profiles apparently teasing the imminent release of her new album, replied to a tweet from Twitter’s official account.
“hello literally everyone,” Twitter said in a joke about an influx of users.
Adele replied: “Hiya babes!”
Legally Blonde star Witherspoon wrote, “All other social platforms today: Kaput. Twitter:” and added a gif of herself shouting “thank you”.
TV personality Chrissy Teigen made her return to Twitter following a break amid a high-profile bullying row.
She said: “everything’s down!! honestly take it all away from us.”
Teigen also posted a video of her dog and told fans she would have shared it to Instagram had the platform been working.
Rapper Snoop Dogg had some predictable advice for any followers looking for ways to stay occupied.
The musician, known for his love of cannabis, said: “Ig (Instagram) down? Roll one and be productive.”
Actress and singer Bette Midler struck a more serious tone and pointed to the bullying often found on social media websites.
She said: “Facebook and Instagram are down. I guess that’s a good thing; a few hours respite for the poor kids who are bullied incessantly on those sites. All the adults in the room are hoping they stay down.”