1.
Here's Justin Bieber performing at the live Season 20 finale of The Voice in May 2021:
And here he is covering Justin Timberlake's "Cry Me a River" on a couch in like 2008:
Watch the full performance here:
Justin Bieber / Via youtube.com
2.
Here's Jessie J performing at the MusiCares Person of the Year gala in 2020:
And here she is (flawlessly) performing "Mama Knows Best" in her bedroom in 2009:
Watch the full performance here:
Jessie J / Via youtube.com
And here she is singing a cover of Whitney Houston's "I Believe in You and Me" in 2012:
Watch the full performance here:
Ariana Grande / Via youtube.com
4.
Here's Billie Eilish performing in Miami during her Where Do We Go? World Tour in 2020:
And here she is singing with her brother, Finneas, in a clip from back in the day:
Watch the full performance here:
roseyyybillie / Via youtube.com
5.
Here's Megan Thee Stallion performing at Lollapalooza in July 2021:
And here she is performing in a freestyle video in 2017:
Watch the full performance here:
Megan Thee Stallion / Via youtube.com
6.
Here's Charlie Puth performing at the Country Music Awards in 2020:
And here he is in a music video for "The Pickle Song" from way back when:
Watch the full performance here:
Charlie Puth Bangladesh / Via youtube.com
7.
Here's Miley Cyrus performing with Wiz Khalifa and Juicy J at Lollapalooza in July 2021:
And here she is rapping about why she deleted Twitter in 2009:
Watch the full performance here:
Miley Cyrus / Via youtube.com
8.
Here's Tori Kelly performing at the Rockefeller Center Christmas tree lighting ceremony in 2020:
And here she is singing a cover of Paramore's "The Only Exception" in 2009:
Watch the full performance here:
Tori Kelly / Via youtube.com
9.
Here's Alessia Cara performing at the Latin Grammy Awards in 2019:
Now here she is singing a cover of Jessie J's "Price Tag" in 2011:
Watch the full performance here:
Alessia Cara / Via youtube.com
10.
Here's Shawn Mendes performing at the American Music Awards in 2020:
And here he is singing a cover of the Neighbourhood's "Sweater Weather" in 2013:
Watch the full performance here:
Shawn Mendes / Via youtube.com
11.
Here's Ed Sheeran performing on The Late Late Show with James Corden in July 2021:
And here he is singing "Autumn Leaves" out in nature in 2009:
Watch the full performance here:
Jake Gosling / Via youtube.com
12.
Here's Lizzo performing at the Brit Awards in 2020:
And here she is singing a cover of Adele's "Someone Like You" in 2011:
Watch the full performance here:
lizzomusic / Via youtube.com
Oh, and please watch her flute cover of Jay-Z and Alicia Keys' "Empire State of Mind" in 2010:
lizzomusic / Via youtube.com
13.
Here's Adele performing at the Grammys in 2017:
Watch the full performance here:
daykinski / Via youtube.com
14.
Here's 5 Seconds of Summer performing at iHeartRadio's Jingle Ball in 2019:
And here they are performing a cover of "Teenage Dirtbag" during Christmastime in 2011:
Watch the full performance here:
5SOS / Via youtube.com
15.
Here's Chloe x Halle performing at the Grammys in 2019:
And here they are performing a cover of Beyoncé's "Love On Top" in 2011:
Watch the full performance here:
Chloe x Halle / Via youtube.com
16.
Here's Dua Lipa performing at the Brit Awards in 2021:
And here's a clip of her singing "Say My Name" by Destiny's Child a long time ago:
Watch the full performance here:
Elton Kanaj / Via youtube.com
17.
And finally, here's Darren Criss performing at the iHeartRadio Music Festival in 2019:
And here he is performing in A Very Potter Musical in 2009:
Watch the full performance here:
Team StarKid / Via youtube.com
