Which teen pop singer and musician was widely known for having more than thirty three million followers on Twitter?

Introduction / Context:
Social media popularity is often measured by the number of followers on platforms such as Twitter. For several years, questions in general knowledge exams have referred to celebrities who crossed remarkable follower counts. This question focuses on a young pop singer and musician who became a global sensation and gained more than thirty three million followers on Twitter at a relatively young age.

Given Data / Assumptions:

• The person is a teen pop singer and musician.
• He achieved a very high number of followers on Twitter.
• The options include film actors, writers, and one famous pop star.
• The follower count is used as a clue to identify that pop star.

Concept / Approach:
The concept tested here is awareness of international popular culture and social media records. Justin Bieber is a Canadian singer who became famous worldwide as a teenager through songs, concerts, and an active online presence. His fan base, often called Beliebers, contributed to his huge Twitter following, which crossed tens of millions. None of the other names in the options match the description of a teen pop singer with such a follower count at that time.

Step-by-Step Solution:
Step 1: Focus on the key description teen pop singer and musician with very high Twitter followers. Step 2: Scan the options for names known primarily as pop singers rather than actors, directors, or writers. Step 3: Recognise that Justin Bieber is a global teen pop icon with a massive social media following. Step 4: Note that Halle Berry is an actress, Bernardo Bertolucci is a film director, William Blake was a poet and artist, and Taylor Swift, though a singer, is not usually described as a teen pop singer in this context. Step 5: Select Justin Bieber as the only option that fully matches the given description.

Verification / Alternative check:
To verify, recall media reports and trivia quizzes that frequently mentioned Justin Bieber leading social media charts, especially among young audiences. At one point he was among the top followed individuals on Twitter. No similar repeated association exists between the quoted follower figure and the other options. Reference books on current affairs and entertainment facts often list Justin Bieber under records related to social media, confirming this choice for examinations.

Why Other Options Are Wrong:
Halle Berry is an award winning Hollywood actress and does not fit the teen pop singer description. Bernardo Bertolucci was an Italian film director and is therefore unrelated to pop music charts. William Blake was an English poet and painter from the eighteenth and nineteenth centuries, long before social media existed. Taylor Swift is indeed a major pop star but is better described as a country and pop singer who gained fame slightly later and is not normally framed in exam questions with this specific Twitter follower statistic.

Common Pitfalls:
A common mistake is to select a name merely because it is recognisable without checking if the profession and description align perfectly. Another pitfall is ignoring the word teen and the reference to social media records, which are key clues pointing to Justin Bieber. To avoid such errors, students should always cross check each option against every part of the question statement instead of relying only on partial matching of information.

Final Answer:
The teen pop singer and musician known for having more than thirty three million Twitter followers is Justin Bieber.