On November 12, 2011 she was a MC for K-POP Music Festival in Sydney together with Yuri. In 2013, Tiffany appeared on the KBS2TV show, Weekly Entertainment, where she seperatley interviewed Hollywood actors Tom Hiddleston, Tom Cruise and Brad Pitt.
On April 7, 2012 she hosted the 2012 Korean Music Wave in Bangkok together with Taeyeon and Nichkhun. From 25 November 2011 to 29 January 2012, Hwang played Carmen Diaz in the musical Fame along with Eunhyuk of Super Junior, Son Ho Young, Go Eun Song, Kim Chan Ho, Shin Ui Jeong, Lina of The Grace, Choi Ju Ri, Ko N and Kim Jung Mo of TRAX.
Tiffany attended South Pointe Middle School and Diamond Bar High School, she then transferred to Korea Foreign Kent High School in Seoul and graduated from there in 2008.
She was born in the same hospital as her former fellow Girls' Generation member, Jessica. She auditioned at the SM Entertainment Starlight Casting System and joined the company on October 2004 in Los Angeles, California.
She trained for 3 years and 7 months before debuting.
The campaign sets out to draw public attention about domestic adoption of orphaned babies.
Several pictures of Tiffany posing with orphaned babies were officially released for the exhibition held at the Insa Art Center in Seoul, Korea dating from 14 December to 19 December.
Tiffany sang the song, " By Myself" which was used for the drama, Princess Ja Myung Go, "Because Its You" for the drama, Love Rain and "One Step Closer" for the drama, All About My Romance.
In May 2016, she made her official solo debut under SM Entertainment with the track," I Just Wanna Dance." Apart from all her solo works, Tiffany was the co-host of Mnet's Sonyeon Sonyeo Gayo Baekseo (Korean: 소년소녀 가요백서), along with Kim Hyesung from November 5, 2007 to June 13, 2008.Tiffany is one of the lead vocalists in the group and is considered the second best singer in GG by SM.The girl group are highly successful in Korea and Japan.Tiffany, along with fellow Girls' Generation member Yuri, was an MC on MBC's Show! She left after a farewell on July 31, 2010 to focus on Girls’ Generation's debuting in Japan.On December 25, 2010, she was a host MC for Christmas Show! She was an MC for the 2010 SBS Gayo Daejeon award ceremony which was held on December 31 at the MBC Dream Center with Yuri and actor Ryu Si Won.Later in the year 2011, Tiffany posed for the December edition of Vogue Korea Magazine, along with member Sooyoung.